from:"Ben"


On 5/1/07, Dotan Cohen <[EMAIL PROTECTED]> wrote:

I have had the misfortune of having a university Windows machine
garble all the email addresses in my addressbook (a txt file so that I
can use it both on my home Fedora machine and on the university
Windows machines). I figure this is as good a time as any to start
learning python and fix the file. How can I iteriate through a text
file that looks like this:

 "=?UTF-8?B?157XqNeZ15Qg15nXoNeY16bXnw==?=" <[EMAIL PROTECTED]>,
 "=?UTF-8?B?157XqNenINen15nXmNek15XXkQ==?=" <[EMAIL PROTECTED]>,
 "=?UTF-8?B?157XqdeUINem15LXkNeZ?=" <[EMAIL PROTECTED]>,

and have it return:
[EMAIL PROTECTED],
[EMAIL PROTECTED],
[EMAIL PROTECTED],

Thanks in advance.

Dotan Cohen

http://lyricslist.com/
http://what-is-what.com/
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Hi Dotan!  Welcome to python!

Here is some code that will do what you need.  It uses the re module,
which are regular expressions.

# You need to import the module:
import re

# Then you need to read in the file that contains your list.
email_list = open("brokenemails.txt","r")

# We need to generate your regular expression.  The grabs anything in
# the file that is between < and >, but it includes the <>
re_mail=re.compile(r"\<(.*)\>")

# Then filter each line of the file through the regex, discarding the
# <> from above, and puts each address into a list.
addresses = [re_mail.search(line).group(1) for line in
email_list.readlines()]

# Now we print them out, comma and newline separated
print ",\n".join(addresses)

Let me know if you need more detail!

Your pal,
Ben
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Re: [Tutor] Fixing garbled email addresses

On 5/1/07, Dotan Cohen <[EMAIL PROTECTED]> wrote:

[snip]
>
> List comprehensions are the best thing ever!
>
> Happy to help,
> Ben
>

With Gmail one must be careful and check that the To and Subject
fields contain what you'd expect.

Does 'list comprehension' mean a detailed explanation of the code? If
so, then I'll be reading a lot of them in the near future. I really do
appreciate the dedication and attention to detail. Thanks.

List comprehension are a python/programming term.  They allow one to make a
list without generating a blank one and appending to it. A very basic
example:

newlist = [item for item in spam(eggs)]

is the same as

newlist = []
for item in spam(eggs):
   newlist.append(item)

If you walk through the code from earlier, you can see where a list
comprehension saved some lines and made the flow easier to read.

Official documentation is here: http://docs.python.org/tut/node7.html(section
5.1.4)
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Re: [Tutor] Aaagh! Stack arrays!?! calc average

On 5/1/07, John Washakie <[EMAIL PROTECTED]> wrote:

Oops, I meant it crashes at line 7..

>
> 1) tinit = data[0][0]
> 2)for d in data:
> 3)if d[0] <= tinit+60:
> 4)sum = sum+d
> 5)else:
> 6)avg = sum/len(sum)
> 7)newData = append([newData],[avg],axis=0)
> 8)tinit = d[0]
>

You didn't include your append() function here, so it's hard to tell whats
going on.  Perhaps you mean to use newData.append(avg) assuming that newData
is a list?

Also, your average looks funky.  If sum is something you can get a len() on,
you can't divide it.  It should be bombing here.
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Re: [Tutor] Aaagh! Stack arrays!?! calc average


On 5/1/07, John Washakie <[EMAIL PROTECTED]> wrote:


Ug,

It still doesn't make sense due to the sum/cnt where cnt is just an
int, and sum is a 1-dimensional array!

I'm missing something here about working with numpy arrays...



You need to add all of  the numbers in your list - you can't just divide a
list by an int.
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Re: [Tutor] Aaagh! Stack arrays!?! calc average


On 5/1/07, John Washakie <[EMAIL PROTECTED]> wrote:


It aint pretty! And if I had just walked away, it probably would've
taken half the time in the morning, but here's what I've come up with
(any suggestions for improvements, or course are welcome):

for d in data:
w = len(d)
if d[0] <= tinit+60:
d = column_stack(d)
cnt,sum = cnt+1,sum+d

else:
avg = sum/(ones(w)*cnt)
tinit,cnt,sum = d[0],0,zeros(n)
if init==0:
newData,init = avg,1
else:
newData = append(newData,avg,axis=0)

return newData





Sorry my last reply was so terse - I needed to catch a train. :)

So you need to check out a couple of functions - namely sum.


numbers=[1,2,3,4,5]
numbers.append(6)
numbers

[1, 2, 3, 4, 5, 6]

sum(numbers)

21

len(numbers)

6

sum(numbers)/len(numbers)

3

WAIT WAIT hold the phone!?  21/5 is NOT 3!  It's 3.5!  The short story here
is that you have to make on of the numbers a floating point to get the
result to return a float, so do this:


sum(numbers)*1.0/len(numbers)

3.5

So there is our average.  If floor division doesn't make sense to you, you
aren't alone.  This changes in Python 3000.  You can read about floor
division here:
http://www.python.org/doc/2.2.3/whatsnew/node7.html

I don't quite know what your stack is for - it can probably be accomplished
using some slices or other fun stuff.

Good luck, and welcome to python!
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Re: [Tutor] Learning to Debug?

2007-05-16 Thread Ben Sherman


On 5/16/07, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote:


I'm moving forward with my learning of Python, but I've decided it's
finally time to address a problem that has haunted me in every language I've
every tried to learn: debugging.   I'm just not very good at it. Does anyone
have recommendations for Python-centric books/online tutorials that teach
you techniques for good debugging?





Hi David, welcome to Python!

You should look at the pdb module.  A good tutorial is at
http://www.ferg.org/papers/debugging_in_python.html

Good luck!
Ben
(accidentally replied directly to David the first time)
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Re: [Tutor] encryption for files/passwords

2007-05-18 Thread Ben Sherman


On 5/18/07, Rohan Deshpande <[EMAIL PROTECTED]> wrote:


Hey all,

I am writing a small python script to maintain some passwords and
identity info.  All the data is in an external file.  what is the best
way to encrypt/decrypt this file's data using a key? I am new to
encryption methods let alone how to do it in python.  I had a look at
python-crypto, ezPyCrypto and yawPyCrypto but they seemed overkill?



If you only need to encrypt passwords, look at the crypt module - it does
one way password hashing.

Good luck!
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[Tutor] how long?

2007-07-03 Thread Ben Waldin

How long will it take until I successfully create my own working program that 
is useful? I have crated the address book ones in the tutors and just want to 
know how long it takes before I start to create my own thought up programs that 
will be useful. Thanks Ben   
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Re: [Tutor] String module; Count

2007-10-17 Thread Ben Sherman

You can only count one at a time.

count = conversion(n).count("0") + conversion(n).count("1")

count is a string method, so it operates directly on the string - you
don't have to call it like you did.

import string
string.count(mystr, "cheese")

is the same as

mystr.count("cheese")

At least it is in newer versions of python.

Let me know if that helped.

Cheers,
Ben

On 10/17/07, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote:
> I am having trouble getting the string.count function to work. I want it to
> count the amount of digits (0 or 1) in the string, but I keep getting an
> error stating the string.count was expecting a character buffer object.
> CODE:
> count = string.count(conversion(n),["0","1"])
>
> ERROR:
> Traceback (most recent call last):
>   File "/Users//Desktop/Project 1.py", line 59, in -toplevel-
> signed_mag()
>   File "/Users//Desktop/Project 1.py", line 29, in signed_mag
> count = string.count(conversion(n),["0","1"])
>   File
> "/Library/Frameworks/Python.framework/Versions/2.4//lib/python2.4/string.py"
> , line 348, in count
> return s.count(*args)
> TypeError: expected a character buffer object
>
> I'm trying to make a decimal to binary converter that has the option to
> select the amount of bits for Signed Binary. I've thought of a way (not
> tested yet) on how to implement the bits, but I first need to count the
> amount of digits in the original conversion. Thanks in advance.
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Re: [Tutor] Beat me over the head with it

2007-12-10 Thread Ben Bartrum

import motivation

(sorry)

> -Original Message-
> From: [EMAIL PROTECTED]
> Sent: Sat, 8 Dec 2007 22:04:04 -0600
> To: [EMAIL PROTECTED]
> Subject: Re: [Tutor] Beat me over the head with it
> 
> Need help with a motivational disorder? ;)
> 
> When you say you want to learn Python, what's the nature of the "want
> to" part? Looking to write a game, land a job, parse a log file?
> 
> Perhaps if you focus on what it is you want to do, that will lead the
> way.
> 
> On Dec 8, 2007 9:08 PM, Theyain <[EMAIL PROTECTED]> wrote:
>> I'm not sure if this is really the place to do this, but I will ask
>> anyways.
>> 
>> Hello everyone, names Theyain.  I want to learn Python.  But I am one of
>> those people who needs some one to "Beat me over the head" to actually
>> learn something.  I can't get myself to actually sit down and read a
>> tutorial on Python because no one is making me.  So can someone help me
>> with this?  I really want to learn python, but I can't do it with out
>> help.
>> 
>> 
>> So help?
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[Tutor] thread not running

2007-12-10 Thread Ben Bartrum

Hello

I have the following, which I use within a CherryPy app.  The subprocess bit is 
just to see if it runs or not.   It works on my home PC (Python 2.5.1 on 
Ubuntu), but not on the live host which has Python 2.4.4 on Debian Etch.  


def daemon():
  while 1:
 myperiodicfunction()
 p = subprocess.Popen('cal > /tmp/stilhere.txt', shell=True)
 time.sleep(30) 

thread.start_new_thread(daemon,())

Is there a way to get it to work without upgrading Python (which I am not keen 
to do, as I prefer the packaged version & security updates)

Thanks


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Re: [Tutor] thread not running

2007-12-10 Thread Ben Bartrum


> What's going wrong when running it with 2.4? AfaIcs, all modules are
> in 2.4, so it my not have to do anything with the Python version, but
> with the underlying system. Any traceback? Perhaps replace the
> subprocess part with just a print statement to see what's happening?

There are no tracebacks, and I have done some more investigation:
1. the thread code works fine standalone on both systems
2. the thread code works within CherryPy on my home PC but does not work within 
CherryPy on the live host
3. Both run the same version of CherryPy - I could not imagine it is a CherryPy 
issue, but unless you have any suggestion I'll try the CherryPy list

The live code runs under supervisor.  Could that make a difference?

Thanks
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Re: [Tutor] Program Specification Request

2008-01-16 Thread Ben Bartrum

>Question(s):
>Q01:  Is this a 'reasonable' first project?

Yes.  But I'd say do it in 2 phases.  First do a command-line version, then do 
the GUI.

>Q02:  We can use either MAC or WinXP but which? Or both?

It realy doesn't matter

>Q03:  Is this the appropriate forum?

Yes


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Re: [Tutor] What web framework?

2008-01-29 Thread Ben Bartrum

Yes, CherryPy is an excellent, and uniquely straightforward tool for writing a 
database-driven web application.  I'd start looking into things like Django for 
larger sites where you also want templating, and client-side interactivity 
through JavaScript etc.
In my simple CherryPy apps, I use Python's own (%) string substitution instead 
of a templating language, so a simple CherryPy app can consist of pure Python 
code, SQL queries and nothing else needed.  



> -Original Message-
> From: [EMAIL PROTECTED]
> Sent: Tue, 29 Jan 2008 01:00:22 -
> To: tutor@python.org
> Subject: Re: [Tutor] What web framework?
> 
> "Terry Carroll" <[EMAIL PROTECTED]> wrote
> 
>> But querying's different.  I'd initially planed on making this a
>> wxPython
>> application, but I think it might be simpler to have it as a web
>> app, even
>> though I'll be the only user, and the db will be resident on the
>> same
>> program I'm querying from.
>> 
>> This calls for using a web framework,
> 
> Not really, a simple CGI app would be suffficient.
> A framework is really only needed where you have lots of pages
> all with the same look n feel and lots of interaction between them.
> If all you need is a query screen and a results screen then basic
> CGI should be more than adequate.
> 
> If you really want more then look at basic CherryPy rather than
> TurboGears/Django. It takes the CGI pains away while keeping
> the code simple and direct.
> 
> TurboGears and Django are both excellent but the learning curve
> for a simple app is more than the gain IMHO. OTOH If you want
> to build knowledge for the future then pick one and go with it.
> It doesn't much matter which they all use the same principles
> its only syntax differences really.
> 
> IMHO at least,
> 
> Alan G.
> 
> 
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Re: [Tutor] PYTHON????

2005-09-01 Thread Ben Vinger

The Python interpreter already contain the code for
multiplication, so you don't need to write it.  You
can just use it:

x = raw_input('give the first number')
y = raw_input('give the second number')
print x,  ' times ', y, ' is', int(x) * int( y)

Or in the interactive interpreter you can just:

>>> 2 * 4
8

Good Luck!

--- [EMAIL PROTECTED] wrote:

> Dear Python,
>  How does a calculator multiply? I want to create a
> computer software that can multiply. How do I
> program the computer to multiply? 
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Re: [Tutor] hey i need some help here

2005-09-11 Thread Ben Vinger

It is almost certain that you are using MS Windows,
and that Python is not in you "system path".
If so, here's what to do:

Add the top-level Python directory to your Windows
"PATH".  On Windows NT this is done with Control
Panel/System/Environment.  On Windows 2000 and Windows
XP it is done with Control
Panel/System/Advanced/Environment Variables.  Edit the
PATH environment variable in the System settings to
add C:\Python22 or C:\Program Files\Python22 (or
wherever you put Python)

(taken from
http://cars9.uchicago.edu/software/python/)

Ben

--- Matt Warren <[EMAIL PROTECTED]> wrote:

> I just started attempting to program and thought i
> would try python as my 
> first tool. However following the beginners guide on
> their page it says to 
> insert python as a command and that it should come
> up with the program 
> information. When i insert python it says it is not
> recognizable as an 
> internal or external command. can somebody help me?
> 

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Re: [Tutor] Website monitoring program.

2005-11-21 Thread Ben Vinger

Below is a program I found at
http://starship.python.net/crew/neale/ (though it does
not seem to be there anymore.)  It uses a seperate
file for the URLs

--- Adisegna <[EMAIL PROTECTED]> wrote:

> My question is how to use a loop to go through a
> tuple of URLs. Please feel
> free to suggest an easier way to do the same thing.

#!/usr/bin/env python

"""watch.py -- Web site change notification tool
Author: Neale Pickett <[EMAIL PROTECTED]>
Time-stamp: <2003-01-24 13:52:13 neale>

This is something you can run from a cron job to
notify you of changes
to a web site.  You just set up a ~/.watchrc file, and
run watcher.py
from cron.  It mails you when a page has changed.

I use this to check for new software releases on sites
that just change
web pages; my wife uses it to check pages for classes
she's in.

You'll want a ~/.watchrc that looks something like
this:

to: [EMAIL PROTECTED]
http://www.example.com/path/to/some/page.html

The 'to:' line tells watch.py where to send change
notification email.
You can also specify 'from:' for an address the
message should come from
(defaults to whatever to: is), and 'host:' for what
SMTP server to send
the message through (defaults to localhost).

When watch.py checks a URL for the first time, it will
send you a
message (so you know it's working) and write some
funny characters after
the URL in the .watchrc file.  This is
normal--watch.py uses these
characters to remember what the page looked like the
last time it
checked.

"""

import os.path
import urllib2 as urllib
import sha
import smtplib

rc = '~/.watchrc'
host = 'localhost'
fromaddr = None
toaddr = None

def hash(data):
return sha.new(data).hexdigest()

def notify(url):
msg = """From: URL Watcher <%(from)s>
To: %(to)s
Subject: %(url)s changed

%(url)s has changed!
""" % {'from': fromaddr,
   'to':   toaddr,
   'url':  url}
s = smtplib.SMTP(host)
s.sendmail(fromaddr, toaddr, msg)
s.quit()

fn = os.path.expanduser(rc)

f = open(fn)
outlines = []
for line in f.xreadlines():
if line[0] == '#':
continue

line = line.strip()
if not line:
continue

splits = line.split(' ', 1)
url = splits[0]
if url == 'from:':
fromaddr = splits[1]
elif url == 'to:':
toaddr = splits[1]
if not fromaddr:
fromaddr = toaddr
elif url == 'host:':
host = splits[1]
else:
if (not fromaddr) or (not toaddr):
raise ValueError("must set to: before any
urls")
page = urllib.urlopen(url).read()
ph = hash(page)

try:
h = splits[1]
except IndexError:
h = None
if h != ph:
notify(url)
line = '%s %s' % (url, ph)
outlines.append(line)

f.close()

f = open(fn, 'w')
f.write('\n'.join(outlines) + '\n')
f.close()

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[Tutor] extra characters in XML

2006-01-11 Thread Ben Vinger

Hello all

I want to do the following in an XML file:

XFile = open(XmlFile,'r')
for line in XFile.readlines():
if line.find('') > 0:
  print line

However, it does not work due to extra characters that
appear in the XML file.  For example if I use the
previous code without the if condition, on a console
it looks like:
< e n d _ t i m e >
And if you output that to a text file and open that in
a text editor, the text editor shows a square instead
of a space in between every character.  What is going
on?

Thanks
Ben





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Re: [Tutor] extra characters in XML

2006-01-11 Thread Ben Vinger

Found the following (which solved the problem, though
not on the console) at
http://www.jorendorff.com/articles/unicode/python.html

  import codecs
  # Open a UTF-8 file in read mode
  infile = codecs.open("infile.txt", "r", "utf-8")
  # Read its contents as one large Unicode string.
  text = infile.read()
  # Close the file.
  infile.close()

The same function is used to open a file for writing;
just use "w" (write) or "a" (append) as the second
argument.

--- Ben Vinger <[EMAIL PROTECTED]> wrote:

> Hello all
> 
> I want to do the following in an XML file:
> 
> XFile = open(XmlFile,'r')
> for line in XFile.readlines():
> if line.find('') > 0:
>   print line
> 
> However, it does not work due to extra characters
> that
> appear in the XML file.  For example if I use the
> previous code without the if condition, on a console
> it looks like:
> < e n d _ t i m e >
> And if you output that to a text file and open that
> in
> a text editor, the text editor shows a square
> instead
> of a space in between every character.  What is
> going
> on?
> 
> Thanks
> Ben
> 
> 
> 
> 
>   
>
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Re: [Tutor] extra characters in XML

2006-01-12 Thread Ben Vinger

Thanks - it was exactly as you said 

--- Kent Johnson <[EMAIL PROTECTED]> wrote:

> Most likely your XML file is 16-bit unicode, not
> utf-8. When ascii text 
> is represented as unicode, every other byte will be
> a null byte. That is 
> the extra character that shows up as a space or box
> depending on who is 
> interpreting it. The utf-8 codec must be swallowing
> the null bytes.
> 
> In your code above, instead of utf-8 try utf_16_be
> and utf_16_le, one of 
> them should work.

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[Tutor] a class knowing its self

2006-01-18 Thread Ben Vinger

Hello

I've been reading about how a class has access to its
own 'self', so I tried the following, but it is not
working as I would expect:

class Skill:
   def __init__(self):
  self.history = []  

   def setName(self, skill):
  self.name = skill

   def getName(self):
  return self.name

# Assigning data to my class:  

SkillNames = [r'python', r'apache', r'mysql']

#a.)
python = Skill()
python.setName('python')
print python.getName()

#b.)
for s in SkillNames:
  s = Skill()
  s.setName(s)
  print s.getName()

Why does a work and b not?   

b returns:
<__main__.Skill instance at 0x401e260c>
<__main__.Skill instance at 0x401e230c>
<__main__.Skill instance at 0x401e23ec>

why does b not return the names of the 3 instances of
Skill?

Thanks
Ben



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Re: [Tutor] a class knowing its self

2006-01-21 Thread Ben Vinger

Yes, you are right, - Shuying Wang's suggestion fixed
the immediate problem, but there is still someting
wrong with my code - maybe I'll ask about it again
later.

--- Ewald Ertl <[EMAIL PROTECTED]> wrote:

> > 
> Have a more precisely look at your code.
> s.getName() does just return, what you have put into
> the class with setName(). ( Reassignment of a
> variable to
> something different what you intended ).

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[Tutor] passwords in scripts

2006-01-21 Thread Ben Vinger

Hello

I've written a couple of scripts that check log files
on our WIndows and Unix servers.  These scripts have
plain text passwords in them, so anyone who can access
the filesystem of the Windows server that runs the
scripts can discover the passwords of the servers.
Is there a way to hide/encrypt these passwords?  Or
can the scripts be converted to compiled code in order
for the passwords to be hidden?


Thanks
Ben 



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Re: [Tutor] passwords in scripts

2006-01-23 Thread Ben Vinger

Hi Ivan

I'm not sure I understand what you are saying here. 
Surely if the file is compiled it can just run (and
will only need to be RE-compiled when I have to change
the code (such as when one of the servers has their
password changed).
I would never need to de-compile, because I'll just
keep a copy of the file  on a memory stick, edit it
there, compile it and replace the current compiled
file with the newly compiled file.
Not that I know anything about compiling Python
programs, I just want to know if this is a possibility

Thanks
Ben

--- Ivan Furone <[EMAIL PROTECTED]> wrote:

> 2006/1/21, Ben Vinger <[EMAIL PROTECTED]>:
> > Hello
> >
> > I've written a couple of scripts that check log
> files
> > on our WIndows and Unix servers.  These scripts
> have
> > plain text passwords in them, so anyone who can
> access
> > the filesystem of the Windows server that runs the
> > scripts can discover the passwords of the servers.
> > Is there a way to hide/encrypt these passwords? 
> Or
> > can the scripts be converted to compiled code in
> order
> > for the passwords to be hidden?
> >
> >
> > Thanks
> > Ben
> >
> >
> 
> Hello,
> Compiling a file in python is a big time
> loss,because there's not a
> built-in function for decompiling,but you can just
> use the 'dis'module
> for disassembling it and the result is always
> different from the
> original,because it uses Abstract Source Tree syntax
> in spite of
> Python language for translating the bytecode;on the
> other hand it
> wouldn't secure the file itself from being accessed
> but makes it
> useless IMHO.Thus,with a slight impact on
> complexity,a module with the
> crypted passwords would be imported, which would
> proceed for checking
> the passwords and exporting them in a StringIO
> object at runtime.For
> enhancing security,once used it could be removed and
> used again when
> needed,without removing the scripts themselves.You
> can check the
> 'crypt' module for this task.
> Cheers,
> Ivan
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Re: [Tutor] passwords in scripts

2006-01-23 Thread Ben Vinger

Hi Danny

The Unix servers are ancient HP-UX ones.  I doubt if
an SSH implementation for them exists, but it is not
worth my while trying to find out, because I will not
be allowed to install anything on them (or even
suggest it).  So I access them using telnetlib:

host = 'hpserver'
user = 'backupuser\r'
password = 'backuppassword\r'
telnetConnection = telnetlib.Telnet(host)
telnetConnection.read_until('login: ')
telnetConnection.read_until('Password: ')
telnetConnection.write(password)
menu = telnetConnection.read_until('Please Enter
choice :')

etc - doing the things programatically what I would
have done if I opened a regular telnet session

On the  Windows servers the scheduled task I use runs
with my domain logon credentials.   This is fine for
the majority of the servers, but some are in other
domains where my  credentials don't do the job. For
them, I just open a connection to the ipc$ share in
advance, like so:

os.system(r'net use \\farserver\ipc$ 
/u:fardomain\administrator farpassword')

The information about all the backup results is
finally served as a single web page, so anyone can see
at a glance whether the backups worked. This can also
easily be emailed out, or warnings can be sent.

But surely my problem is a very common one.  Every
web-app must supply a username and password to make a
connection to its backend database, for example.

Thanks
Ben

--- Danny Yoo <[EMAIL PROTECTED]> wrote:

> I guess one question might be: why are the passwords
> there in the first
> place?  *grin*
> 
> 
> It's usually a good idea to try avoiding hardcoding
> things in a program,
> and that goes for passwords too.  If you're using
> passwords to connect to
> the Unix servers, you might want to consider looking
> at Keychain:
> 
> http://www.gentoo.org/proj/en/keychain/
> 
> to avoid having to do manual password entry. 
> Alternatively, 'ssh' can
> be used to run remote commands on a Unix server. 
> There's a good example
> of this here:
> 
> http://www.jdmz.net/ssh/
> 
> 
> If you could tell us more details on why those
> passwords are there, we
> might have some better suggestions.
> 
> 
> Good luck!
> 
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Re: [Tutor] passwords in scripts

2006-01-24 Thread Ben Vinger

--- Alan Gauld <[EMAIL PROTECTED]> wrote:

> command line arguments?
> 
> $ startapp -d mydb -l user/password &
> 
> That way they are 
> 1) kept secret(especially if you turn shell history
> off ;-) and 
> 2) can be changed every time you restart the server
> app and
> 3) you can have production and test databases
> running simultaneously...

These are good points, but what if the server is
bounced when I'm on holiday (or everyone who might
enter the password is asleep).  
My own little app isn't critical, but I can't see this
do the trick for high profile web sites and similar.

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Re: [Tutor] passwords in scripts

2006-01-24 Thread Ben Vinger

Compiling is certainly helpful in my case, and I did
not realise how simple it was until you explained it. 
I estimate that most of our MCSEs will not know about
the strings command or attempt to look inside
something like test.pyc for a password.
As for users, I'll be amazed if they tried it.   And
real crackers - I think our network/firewall people
know what they are doing, so I assume crackers are
kept out.
So, yes, I will use this until I've done something
with crypt and/or expect.  
Finally, regarding changing the policy about telnet -
it looks to me like the network where I am (I'm very
new), is secure on the networking side however lax it
might be on the server side.  It is 100% switched,
which means that only by controlling a switch can
cleartext stuff be seen, and the switches are
well-protected (also physically).  So while I might
agree with everyone who mentioned it, I will leave the
Unix security to whoever in our large organisation's
concern it is.  I just want to avoid endangering it
myself.

Thanks
Ben

--- Danny Yoo <[EMAIL PROTECTED]> wrote:

> 
> 
> On Tue, 24 Jan 2006, Ivan Furone wrote:
> 
> > I'm not sure I understand what you are saying
> here. Surely if the file
> > is compiled it can just run (and will only need to
> be RE-compiled when I
> > have to change the code (such as when one of the
> servers has their
> > password changed).
> 
> Hi Ivan,
> 
> But the issue is that hardcoding passwords in a
> program doesn't really
> protect that password from exposure.  For example:
> 
> ##
> bash-3.00$ cat test.py
> message = "hello, this is a test"
> bash-3.00$ python
> Python 2.3.3 (#1, Nov  7 2005, 22:36:37) [C] on
> sunos5
> Type "help", "copyright", "credits" or "license" for
> more information.
> >>> import test
> >>> ^D
> ###
> 
> 
> Doing the import will cause test.py to be compiled
> to 'test.pyc':
> 
> ##
> bash-3.00$ ls -l test.pyc
> -rw-r--r--   1 dyoo other143 Jan 24
> 10:55 test.pyc
> ##
> 
> 
> But watch what happens here:
> 
> ##
> bash-3.00$ strings test.pyc
> hello, this is a testN(
> message(
> message(
> test.pys
> ##
> 
> Our secret string shows right up!
> 
> 
> 
> This works even if we're talking about C code:
> 
> /**/
> bash-3.00$ cat test.c
> #include 
> int main(int argc, char** argv) {
>   char *msg = "hello";
> }
> bash-3.00$ gcc test.c
> bash-3.00$ strings a.out
> hello
> /**/
> 
> 
> So the fact that we're "compiling" code doesn't do
> anything significant to
> add security: those string literals are ripe for the
> taking for anyone
> competent enough to use the 'strings' command.  So
> that's what we're
> trying to warn you about.  Compiling code is not a
> magic wand to obscure
> secrets.
> 
> 
> Hope this helps!
> 
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Re: [Tutor] mod_python and other web frameworks

2006-01-25 Thread Ben Vinger


--- Intercodes <[EMAIL PROTECTED]> wrote:

> List: I am still open to suggestions.

Being also keen to write better web apps in Python,
I've spent a considerable amount of time reading about
this (and it is indeed confusing), I've opted to try
out something like Pylons or Turbogears.
One thing I will say though, is that most of the
frameworks you've read about can be run on top of
mod_python.  So mod_python is not one of the lot - it
is essential on Apache unless you opt to use CGI or
FCGI. But as I understand it, you would always opt for
mod_python over CGI or FCGI on a high-traffic website,
though CGI or FCGI is of course fine for smaller
things.
But mod_python is not so easy to work with and it will
only work on Apache.  So it seems best to choose
something else and run that through mod_python when
you're on Apache.






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[Tutor] Trying to enter text from a file to a Dictionary

2006-01-26 Thread Ben Markwell

Being new to programming, I made a text file that contains terms with their definitions that I have come across in my studying. As an exercise, I thought I would make a glossary using a dictionary so I can look up words, add new words, view all entries, etc. I want to enter the words and definitions from the text file into the dict. The way the text file is set up is that one line is the word and the next line is the definition. For example: Word Definition of the word. Second Word Definition of the second word. EtcI thought this would be rather simple (maybe it really is), but I'm stuck. I can't figure out how to tell Python to read the line with the word, add the word to the Key of the dict, then read the next line and add that line to the Value of the dict, then do it all again 'til the end of the file.I tried using a!
for loop
like thisf = open('glossary.txt','r') gloss = {}for line in f: gloss[line] = lineWhen I tried to print this, a huge list of key/values printed out. With many copies of the same key/value pair. And the key and the value were the same. (not word followed by definition) , which afterword made sense, because, I told it that gloss[line] = lineI tried :for line in f: gloss[line] = f.readline()That got me nowhere. Sorry for being so dense. I understand what needs to happen, but am having trouble implementing it. Thanks for your help and understanding.
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[Tutor] Fwd: Trying to enter text from a file to a Dictionary

Hello Danny

Thanks for replying to my post.
>   I tried :>>   for line in f:Thanks for your reply to my post. 


>   gloss[line] = f.readline()>
This should have worked, but there's one problem.  Whenever we're doingsomething like:for line in f:...there can be some interference between the iteration and any readline()
in the body of the loop.  For efficiency reasons, the iterator's allowedto march through the file ahead several lines at with an internal buffer.This means our position in the file might be further along than we might
realize, and that means that readline() will give nonsensical results.So we're getting caught by a low-level detail.  We should try to avoidusing both the for loop and readline() on the same file. Here's one way we
can avoid the problem:
while True:word = f.readline()defn = f.readline()if not word or not defn:   break...Does this make sense?
 It does mostly...I don't see why you need the:

 if not word or not defn:





   break











If this is so that when python iterates to the end of the file, it
knows to stop, and if that is so, then why doesn't python know it has
gotten to the end of the file without it being told?
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Re: [Tutor] Fwd: Trying to enter text from a file to a Dictionary

Hi Ben,Yes, that's the point: Python doesn't know when to stop.  *grin*
The way we've rewritten the loop:while True:...is an "infinite" loop that doesn't stop unless something in the loop'sbody does something extraordinary, like "breaking" out of the loop.
Python is much dumber than we might expect.In more detail: Python's readline() method doesn't fail when we reach theend of a file:  we actually start hitting the empty string.  For example:##
>>> import StringIO>>> sampleTextFile = StringIO.StringIO("""This is... a sample... text file... """)>>> sampleTextFile.readline()'This is\n'
>>> sampleTextFile.readline()'a sample\n'>>> sampleTextFile.readline()'text file\n'>>> sampleTextFile.readline()''>>> sampleTextFile.readline()''##
Notice that when we hit the end of the file, readline() still continues torun and give us empty string values.  That's why the loop above needs tomake sure it breaks out in this particular situation.
Does this make sense?  Please feel free to ask questions about this.
Yes The  -- while true loop
--  needs something to be false or it needs to be told when to
stop. If that is correct, then it makes sense. 

Thanks 
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Re: [Tutor] Trying to enter text from a file to a Dictionary

On 1/27/06, Bob Gailer <[EMAIL PROTECTED]> wrote:
Bob Gailer wrote:> Alan Gauld wrote:>>> Hi Ben,>>>>>>>>> I want to enter the words and definitions from the  text file into the>>> dict.>>> The way the text file is set up is that one  line is the word and the
>>> next line is the definition.>>>>>>>>>>>>>  I tried using a for loop like this>>>>>>  f = open('glossary.txt','r')>>>  gloss = {}
>>>>>>  for line in f:>>>  gloss[line] = line>>>>>>>> The problem that you have is that you really need to read two lines at a>> time.
>> (Assuming that the definitions are all on one line which may not be true!)>> A while loop may be easier in this case.>>>> A for loop will read each line individually. You then need to set a
>> definition>> flag to tell the loop body whether you are reading a definition or a key.>>>> Either type of loop is possible. Since you started with a for loop lets>> stick with it...
>>>> definition = False>> currentKey = None>>>> for line in f:>> if isDefinition:>>gloss[currentKey] = line>>currentKey = None
>>isDefinition = False>> else:>>currentKey = line>>isDefinition = True>>>>> Or you can use next():>> for line in f:
> gloss[line] = f.next()>Or even:[gloss.setdefault(l,f.next()) for l in f]
Hello Bob

I understand f.next(), but [gloss.setdefault(l,f.next()) for l in f] is beyond me at this point.
Thanks for your input.

Ben
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Re: [Tutor] Trying to enter text from a file to a Dictionary

> I understand f.next(), but [gloss.setdefault(l,f.next()) for l in f]> is beyond me at this point.
[expr for l in f] is a "list comprehension". expr is an _expression_ thatmay involve l.result = [expr for l in f] # is equivalent to:result = []for l in f:result.append(expr)
"list comprehension" (once understood) is often easier to read and moreefficient than the for loop.result = xxx.setdefault(key, newvalue) is a dictionary method that triesto get an item from the dictionary xxx using key. If the key is not in
the dictionary it adds the item assigning it newvalue. Equivalent to:if key not in xxx:xxx[key] = newvalueresult = xxx[key]Note that list comprehension and setdefault both return something. In my
code the returned values are ignored. The outcome (populating adictionary via a loop) is a "side effect".
Thank you Bob.  This is much to think about.  I very much appreciate your concise explanation.
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[Tutor] Trapping a Dr Watson error

2006-02-02 Thread Ben Vinger

Hello

I have a script based on:
http://aspn.activestate.com/ASPN/docs/ActivePython/2.4/pywin32/Windows_NT_Eventlog.html
It collects eventlogs data from many Windows servers.
I know how to handle normal Python Tracebacks, but my
script bombs out with a Dr Watson error when
connecting to one particular server.
(It even runs fine against the Application log of this
server, but bombs out on the System log).  Anyways, I
want to know if it is possible to trap, handle and
survive a Dr Watson error programatically

Thanks
Ben




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Re: [Tutor] python help

2006-02-08 Thread Ben Vinger

Why are these homework programming challenges so
recognisable?  It boils down to:
Write a function that that uses X and Y techniques.
The function may be hard and challenging to write but
doesn't ever do anything interesting or anything that
is useful and complete on its own.

I realise teachers have to test mastery of certain
techniques, but they seem to lack the imagination. 
Especially with modern languagues like Python, where
you can write a whole program that actually does
something usefull using only a few lines of code it
should not be necessary to ask these kinds of dull
questions.

Just stick at it Natasha, it is far more interesting
when you the programming challenge has to accomplish a
real result.

Ben
--- Natasha Menon <[EMAIL PROTECTED]> wrote:

> Hi,
>
>   I have a few doubts in python programming. C if
> any of u can help me out. 
>
>   1. 
>   In a file called string_stuff.py i have to write a
> function called frequencies that takes a string as a
> parameter and returns a dictionary where the keys
> are the characters from the string and each value is
> an integer indicating the number of times the key
> appeared in the string. 
>
>   2.
>   Similary in the same file string_stuff.py, have to
> write a function called locations that takes a
> string as a parameter and returns a dictionary where
> the keys are the characters from the string and each
> value is a list indicating the indices in the string
> at which the key appears, sorted in increasing
> order.
>
>   3.
>   In the same file string_stuff.py, write a function
> called concordance that takes an open file as a
> parameter and returns a dictionary where the keys
> are the strings from the file and each value is a
> list of line numbers of the lines in which the key
> appeared, sorted in increasing order. Start counting
> at 0. Each line number should appear at most once in
> a list, even if a word appears twice on a line. You
> may assume that the input consists only of
> alphabetic letters (a-z, A-Z) and whitespace. 
>
>
>   Id really appreciate if you could help me on these
> small question. I am tryin to learn to program in
> python.
>
>   Thanks,
>   Natasha
> 
>   
> -
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[Tutor] How can a function know where it was called from

2006-03-02 Thread Ben Vinger

Hello
 
I want myfunction in the pseudocode below return something different if it was called from indexfunction.
 
def indexfunction():    blah
 
def myfunction():   x = 'whatever'   if :  return x   else:  return  + x +  
 
 
Thanks
Ben
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Re: [Tutor] How can a function know where it was called from

2006-03-02 Thread Ben Vinger

Thanks to all who responded.  I ended up using  a sender parameter as suggested by Andre and Alan, as this was very simple to do.
 
Ben
 
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Re: [Tutor] How to monitor streaming data from the internet via modem?

2006-03-09 Thread Ben Vinger

On 3/8/06, Alan Gauld <[EMAIL PROTECTED]> wrote:
Ethereal is one well knownand powerful one, but there are others which may be simpler touse. 

 
Yes, with Ethereal comes a command-line version called tethereal, which I've used within Python on both Windows and Linux.  It worked nicely for trafic analysis, but if you're interested only in the clear text passing through the line, I'd think of using netcat.  

 
 (Sorry Alan, my previous attempt went straight to you instead of the list) 
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[Tutor] Build your own web server in three lines of code

2006-03-23 Thread Ben Vinger

The nice-looking, revamped Python web site states that
you can do this, but does not go on to say how.  
Does anyone know?

On an OT note, I've recently seen how it can be done
in a shell script:
http://www.debian-administration.org/articles/371

Ben



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[Tutor] TypeError: dict objects are unhashable

2006-03-24 Thread Ben Vinger

Hello

I want to create a dictionary (from SQL usernames) of
the format:
  accounts = {
  ('psmit', '123456'): 'psmit',
  ('rmatt', 'mypass'): 'rmatt',
  }

So I have:
  accounts = {}
  UserCursor.execute(sqlstr)
  rows = UserCursor.fetchall()
  UserConn.commit()
  for row in rows:
U = row['User']
P = row['Password']
InnerDict = {}
InnerDict[U] = P
accounts[InnerDict] = U

But I get:
TypeError: dict objects are unhashable
Unfortunately, I just can't see what I'm doing wrong

Thanks



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[Tutor] List slicing and joining

2007-04-11 Thread Ben Sherman

I've got a list that contain a bunch of information, including the
FQDN of a host.

host_data=['foo.example.com', 'other unimportant data']

I need to seperate the hostname from the domain name.

This is how I'm doing it, and it work, but it seems *really* hacky.
Is there a better (or more pythony) way?

hostname=host_data[0].split(".")[0]
domain=".".join(host_data[0].split(".")[1:])

Thanks,
Ben
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Re: [Tutor] please help me!

2007-04-12 Thread Ben Sherman

You

On 4/12/07, suryo agung <[EMAIL PROTECTED]> wrote:
> pleate tell me how to make
>
> input number=4
> result
>
> 1
> 22
> 333
> 
>
> in python
> please give me your answer.

input_number = 4

for i in range(1,input_number + 1):
  print str(i) * i

If this is homework, please tell your teacher I helped - I need the
extra credit.
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[Tutor] Scanning a file for specific text and copying it to a new file

2010-12-02 Thread Ben Ganzfried

I'm trying to build a program that reads in a file and copies specific
sections to a new file.  More specifically, every time the words
"summary on" are in the original file, I want to copy the following
text to the new file until I get to the words "summary off".

My questions are the following:
1) Once I have read in the old file, how do I copy just the parts that
I want to the new file?  What command do I give the computer to know
that "summary on" (whether capitalized or not) means start writing to
the new file-- and "summary off" means stop?  Also, I assume I'll put
all of this in a while loop based on the condition that we should read
until we are done reading the whole document?  (although, this is
somewhat inefficient because the last "summary on/off" could be way
before the end, but this is preferable to missing one that is at the
end...)

Thank you very much for any help you can provide.  Much appreciated!

Ben
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[Tutor] Meaning of -1 in Python

2010-12-10 Thread Ben Ganzfried

I'm currently working through the Google Python tutorial exercises and
had questions about the following function:

def not_bad(s):
  # +++your code here+++
  # LAB(begin solution)
  n = s.find('not')
  b = s.find('bad')
  if n != -1 and b != -1 and b > n:
s = s[:n] + 'good' + s[b+3:]
  return s

It's clear that n!=-1 and b!=-1 means something like : "if in the
string 's' we find the word "not" and in string 's' we find the word
"bad."

I'm wondering the following:
On a deeper computational level, what is going on here?  What exactly
does Python take -1 to mean?  Is it saying that since the string 's'
is indexed starting from 0 to len(s), and since -1 is not part of
that, that therefore something having the value of -1 will never be in
the string?  If so, then how exactly does using negative numbers to
count a string work?  I have read something about this earlier...

Also, does the part: b>n mean, in this case: "bad comes after not in
the string 's'"?

Thank you very much.

Sincerely,

Ben
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[Tutor] Tab delimited question

2010-12-13 Thread Ben Ganzfried

I'm searching line by line for certain tags and then printing the tag
followed by the word immediately following the tag.

So for example, suppose I had the following line of text in a file:
"this   is  a   key test123 noisenoise  noise   noise   noise"

In this example, I would want to print "key test123" to a new file.
The rest of the words I would not want.

Here is my code so far:

def test(infile, outfile):
  for line in infile:
tagIndex = line.find("key")
start = tagIndex + 4
stop = line[start:].find("\t") -1
if tagIndex != -1:
print("start is: ", start)
print("stop is: ", stop)
print("spliced word is ", line[start: stop])

My question is the following: What is wrong w/ the variable 'stop'?
The index it gives me when I print out 'stop' is not even close to the
right number.  Furthermore, when I try to print out just the word
following the tag w/ the form: line[start: stop], it prints nothing
(it seems b/c my stop variable is incorrect).

I would greatly appreciate any help you have.  This is a much
simplified example from the script I'm actually writing, but I need to
figure out a way to eliminate the noise after the key and the word
immediately following it are found.

Thank you very much for any help you can provide.

Ben
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[Tutor] AttributeError: 'list' object has no attribute 'find'

2010-12-21 Thread Ben Ganzfried

Hey,

I keep getting the error above and unfortunately browsing through
google and finding similar responses has not been fruitful for me.  My
code is below and I have marked off the location of the problem in my
code.  I'm wondering the following:

1) Doesn't the read() file object method return the specified
characters from the file as a string?
2) If #1 is correct, then why is my variable "source" being viewed as
a list as opposed to a string?
3) How can I change my variable "source" so that it can use the 'find'
method?  Or alternatively, is there another method besides the 'find'
method that would do the same thing that 'find' does that would work
on my variable 'source' as it currently is?

Thanks so much,

Ben

#recursively find each instance of the tag throughout the whole document
def findOneTag (tag, source, output):
print("tag is ", tag)
#print("source is now ", source)
print("output is ", output)
#base case
if source == "":
return
#recursive case
tagIndex = source.find(tag) #(*THIS IS THE LOCATION OF THE
PROBLEM**)
print("tagIndex is ", tagIndex)
start = source[tagIndex:].find("\t") + 1
print("start is ", start)
stop = source[tagIndex + start:].find("\t")
print("stop is ", stop)
if tagIndex !=-1:
output.write(tag + "\t" + line[start: stop])
print("spliced text is: ", line[start:stop])
#recursively call findOneTag(tag, String source[stop:], output)
findOneTag(tag, source[stop + 1:], output)

def main():
tag = "species"
inname = "skeletontext.txt"
outname = "skeletontext1234567.txt"
inname1 = open(inname, "r")
output = open(outname, "w")
source = inname1.readlines()
print("source is: ", source)
findOneTag(tag, source, output)
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[Tutor] Java Virtual Machine Launcher Question

2010-12-26 Thread Ben Ganzfried

Happy holidays everyone!

My current question relates to a broader python programming question I
have and so I thought it was worth posting here.  I'm trying to read a
single MAGE-TAB file (http://www.mged.org/mage-tab/) and acquire
metadata.

I just downloaded WinRAR to open zip files, but when trying to open
the .jar file for my converter, I get the following message:

"Java Virtual Machine Launcher:

Failed to load Main-Class manifest attribute from
C:\Users\Ben\AppData\Local\Temp\Rar$DI01.718\isatools_deps.jar"

If anyone could help me better understand how to fix this, what is
happening and/or point me in the right direction, I would be very much
obliged.

Thank you very much!

Ben
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[Tutor] Odd result from function call

2011-01-07 Thread Ben Ganzfried

When I call one of my functions from the shell (ie compare(10, 5)) it
produces the correct output.  However, when I run the program after calling
the method later in the script, the result is bizarre.  I'm curious why the
wrong result is printed.  Here is an example:

def compare(x,y):
if x < y:
print (x, " is less than ", y)
print("x is ", x, "y is ", y)
elif x > y:
print(x, " is greater than ", y)
else:
print(x, " and ", y, " are equal.")


x = input("First x is: ")
y = input("First y is: ")
print("x is ", x)
print("y is ", y)
compare(x,y)
a = input("Second x is: ")
b = input("Second y is: ")
print("x is ", a)
print("y is ", b)
compare(a,b)
c = input("Third x is: ")
d = input("Third y is: ")
print("x is ", c)
print("y is ", d)
compare(c,d)

Sample (and incorrect) output w/ 10, 5:

First x is: 10
First y is: 5
x is  10
y is  5
10  is less than  5
x is  10 y is  5
Second x is:

When I do simply compare(10, 5) from the shell, I get the correct output (ie
10 is greater than 5).  I had thought I had narrowed the problem down to the
fact that when I run the script only the first digit is counted-- however,
it seems as if only the first digit is counted (ie anything starting w/ a 9
will be greater than anything starting with a 1 (even if the numbers are 9
and 1324234)), and THEN, the second digit is counted (such that 89 is
correctly identified at 81).

Anyway I'm wondering:
1) Why does the script run correctly when I simply call the function from
the shell but not when I try to call the function from within the script?
2) What is actually going on such that only the first digit is being
evaluated?  That is, the interpreter knows that x is 10 and y is 5-- and
yet, for some reason the 5 is being tested against the 1 and since 5 is
bigger than 1, it concludes that 5 is greater than 10.

thanks!

Ben
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[Tutor] Object/Class Beginner Questions

2011-01-14 Thread Ben Ganzfried

Hey guys,

I'm using a tutorial geared for a 2.x version of Python and I am currently
using Python 3.1-- so it is possible that my confusion has to do with
different notations between them.  But in any case, here is what I have:

>>> type(Time)

>>> t1 = Time()
>>> type(t1)


where:

class Time:
def __init__(self, hours = 0, minutes = 0, seconds = 0):
   self.hours = hours
   self.minutes = minutes
   self.seconds = seconds

def print_time(t1):
print(t.hours, ":", t.minutes, ":", t.seconds)

Now the book I am working with has the following example:

>>> type(Point)

>>> p = Point()
>>> type(p)


My questions are the following:
1) Why is the type for my class Time : >>> type(Time)
  
when the type for their class Point is: 
Also, what is the difference between "class" and "classobj" in this case?
2) Why does my t1 object give the following as its type: 
And in their p object example the type is: ?
3) What is happening such that when I try to call my print_time(t1) function
I get the following error:
>>> t1 = Time()
>>> t1.hours = 3
>>> t1.minutes = 30
>>> t1.seconds = 45
>>> print_time(t1)
Traceback (most recent call last):
  File "", line 1, in 
print_time(t1)
NameError: name 'print_time' is not defined


Thank you very much.

Sincerely,

Ben
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Re: [Tutor] Object/Class Beginner Questions

2011-01-14 Thread Ben Ganzfried

I actually just figured it out (since the tutorial talks about the
difference in indentation between a method and a function in a later
chapter).  Basically, a method is within a class and therefore cannot be
called from the command prompt whereas a function that stands by itself in a
script can be called from the command prompt.

Although if this isn't quite right or there's more to it, I would still
definitely appreciate any advice you have.

Thanks again,

Ben

On Fri, Jan 14, 2011 at 1:53 PM, Ben Ganzfried wrote:

> Hey guys,
>
> I'm using a tutorial geared for a 2.x version of Python and I am currently
> using Python 3.1-- so it is possible that my confusion has to do with
> different notations between them.  But in any case, here is what I have:
>
> >>> type(Time)
> 
> >>> t1 = Time()
> >>> type(t1)
> 
>
> where:
>
> class Time:
> def __init__(self, hours = 0, minutes = 0, seconds = 0):
>self.hours = hours
>self.minutes = minutes
>self.seconds = seconds
>
> def print_time(t1):
> print(t.hours, ":", t.minutes, ":", t.seconds)
>
> Now the book I am working with has the following example:
>
> >>> type(Point)
> 
> >>> p = Point()
> >>> type(p)
> 
>
> My questions are the following:
> 1) Why is the type for my class Time : >>> type(Time)
>'type'>
> when the type for their class Point is: 
> Also, what is the difference between "class" and "classobj" in this case?
> 2) Why does my t1 object give the following as its type:  '__main__.Time'>
> And in their p object example the type is: ?
> 3) What is happening such that when I try to call my print_time(t1)
> function I get the following error:
> >>> t1 = Time()
> >>> t1.hours = 3
> >>> t1.minutes = 30
> >>> t1.seconds = 45
> >>> print_time(t1)
> Traceback (most recent call last):
>   File "", line 1, in 
> print_time(t1)
> NameError: name 'print_time' is not defined
>
>
> Thank you very much.
>
> Sincerely,
>
> Ben
>
>
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Re: [Tutor] Object/Class Beginner Questions

2011-01-14 Thread Ben Ganzfried

* I meant that*: A method actually can be called from the command prompt,
but the syntax is quite different than that used to call a function from the
command prompt.

On Fri, Jan 14, 2011 at 2:37 PM, Ben Ganzfried wrote:

> I actually just figured it out (since the tutorial talks about the
> difference in indentation between a method and a function in a later
> chapter).  Basically, a method is within a class and therefore cannot be
> called from the command prompt whereas a function that stands by itself in a
> script can be called from the command prompt.
>
> Although if this isn't quite right or there's more to it, I would still
> definitely appreciate any advice you have.
>
> Thanks again,
>
> Ben
>
>
> On Fri, Jan 14, 2011 at 1:53 PM, Ben Ganzfried wrote:
>
>> Hey guys,
>>
>> I'm using a tutorial geared for a 2.x version of Python and I am currently
>> using Python 3.1-- so it is possible that my confusion has to do with
>> different notations between them.  But in any case, here is what I have:
>>
>> >>> type(Time)
>> 
>> >>> t1 = Time()
>> >>> type(t1)
>> 
>>
>> where:
>>
>> class Time:
>> def __init__(self, hours = 0, minutes = 0, seconds = 0):
>>self.hours = hours
>>self.minutes = minutes
>>self.seconds = seconds
>>
>> def print_time(t1):
>> print(t.hours, ":", t.minutes, ":", t.seconds)
>>
>> Now the book I am working with has the following example:
>>
>> >>> type(Point)
>> 
>> >>> p = Point()
>>
>> >>> type(p)
>> 
>>
>> My questions are the following:
>> 1) Why is the type for my class Time : >>> type(Time)
>>   > 'type'>
>> when the type for their class Point is: 
>> Also, what is the difference between "class" and "classobj" in this case?
>> 2) Why does my t1 object give the following as its type: > '__main__.Time'>
>> And in their p object example the type is: ?
>> 3) What is happening such that when I try to call my print_time(t1)
>> function I get the following error:
>> >>> t1 = Time()
>> >>> t1.hours = 3
>> >>> t1.minutes = 30
>> >>> t1.seconds = 45
>> >>> print_time(t1)
>> Traceback (most recent call last):
>>   File "", line 1, in 
>> print_time(t1)
>> NameError: name 'print_time' is not defined
>>
>>
>> Thank you very much.
>>
>> Sincerely,
>>
>> Ben
>>
>>
>
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[Tutor] OOP question

2011-01-18 Thread Ben Ganzfried

Hey guys,

I'm trying to get a version of Roulette working and I had a quick question.
Here is my code:

class Outcome:

def __init__(self, name, odds):
self.name = name
self.odds = odds

def winAmount(self, amount):
return odds*amount

def __eq__(self, other):
if (self == other):
return True
else:
return False

def __ne__(self, other):
if (self != other):
return True
else:
return False

def __str__(self):
return "%s (%d:1)" % ( self.name, self.odds )

Now whenever I try to call the winAmount method, I get the following error:
NameError: global name 'odds' is not defined

I'm wondering the following: I had thought that by initializing "odds" in
the first initialization method that "odds" should then be accessible to all
the other methods in the class.  This does not seem to be the case.  So what
is the ideal fix?  On the one hand I still need to initialize "odds",
right?  But if "odds" is within the initialization method, how else can it
be accessed by the other methods?

Thanks so much!

Ben
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[Tutor] Project Idea

2011-01-28 Thread Ben Ganzfried

Hey guys,

Would it be feasible for a beginner to write a script that could connect
with:
https://chrome.google.com/extensions/detail/laankejkbhbdhmipfmgcngdelahlfoji
?  More specifically, I am interested in writing a script such that the user
would have to enter a short password (say 6 random letters) and only then
could they access the Internet.  (Also, it looks like stayfocusd only works
for google chrome...i'd love for my script to apply to all other internet
browsers that may be installed on a computer as well).

If so, I would love to hear any tips or advice for getting started that you
could suggest.

Thanks a bunch,

Ben
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[Tutor] Roulette Unit Test Questions

2011-02-05 Thread Ben Ganzfried

Hey,

I'm having a lot of confusion getting the unit test working for one of my
classes for the Roulette bot I'm working on and would greatly appreciate any
advice or help.

Here is the description of what I am trying to do:
http://homepage.mac.com/s_lott/books/oodesign/build-python/html/roulette/bin.html
.  Basically, I have my Bin class working and I am trying to get my BinTest
class to do the following: Perform a unit test of the
Binclass.
The unit test should create several instances of
Outcome,
two instances of
Binand
establish that
Bins
can be constructed from the
Outcome
s.

While I would greatly appreciate any pointers in fixing my mistakes, I would
also greatly appreciate any pointers telling me what exactly it is that I do
not yet understand.

Thanks a bunch, my code is below.

Here is my Bin class:

from Outcome import *
class Bin:

def __init__(self, *outcomes):
self.outcomes = outcomes

def add(self, outcome):
self.outcomes += outcome
return self.outcomes
def __str__(self):
return (', '.join( map(str,self.outcomes)))



Here is the code for my BinTest class:

import Outcome
import Bin

class BinTest:
def __init__(self):
pass

def create_Outcome(outcome):
o1 = Outcome(outcome)

#creates two instances of Bin
def create_Bin():
b1 = Bin(("Red", 5), ("Black", 17),("Red", 5))
b2 = Bin(("00-0-1-2-3"), ("00"))
#establishes that Bin can be constructed from Outcome
def construct_Bin_from_Outcome():
b3 = Bin(o2)
b4 = Bin(o4)
b5 = Bin(o1)

def main():
bin_test1 = BinTest()
bin_test1.create_Outcome()
#create_Outcome("Red", 5)
#create_Outcome("Black", 17)
#create_Outcome("Red", 5)
#create_Outcome("00-0-1-2-3")
#create_Outcome("00")

print("o2 is ", o2)
print("o3 is ", o3)
print("o4 is ", o4)
print("o5 is ", o5)
print("b1 is ", b1)
print("b2 is ", b2)
print("b3 is ", b3)
print("b4 is ", b4)
print("b5 is ", b5)

if __name__ == "__main__":
main()
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[Tutor] Tic-Tac-Toe

2011-02-19 Thread Ben Ganzfried

Hey,

I *think* that everything is working except my function gameWon.  I keep
getting the following error: " line 67, in gameWon
if (cell % 3 == 0) and (self.__mycells[cell] ==  self.__mycells[cell +
1]) and (self.__mycells[cell + 1]== self.__mycells[cell + 2]):
TypeError: unsupported operand type(s) for %: 'instance' and 'int'
>>> "

My thinking was the following: I wanted to check the verticals, horizontals,
and diagonals to see if they were the same.  If so, then the game is won.
I'm not sure why I'm not actually comparing the value inside the appropriate
cells, but clearly the error means that what I'm trying to do is not what is
actually happening.  My full code is below and I would greatly appreciate
any help you can provide.

Thanks,

Ben

_-

#Ben Ganzfried
#2/18/11
#Tic-Tac-Toe

class Player:


def __init__(self, name, type):
self.__name = name
self.__type = type

def move(self):
cell_index = input("%s's (%s) move: " & (self.__name, self.__type))
cell_index = int(cell_index)
while cell_index > 8 and cell_index < 0:
print("Please retry...")
cell_index = input("%s's (%s) move: " & (self.__name,
self.__type))
return cell_index

def getName(self):
return self.__name

def getType(self):
return self.__type

class Board:

def __init__(self):
self.__mycells = []
for i in range(0, 9):
current_cell = Cell()
self.__mycells.append(current_cell)

def print1(self):
counter = 0
for cell in self.__mycells:
cell.print1()
counter +=1
if counter % 3 == 0:
print("\n")

def setCellToX(self, cell_number):
cell = self.__mycells[cell_number]
if not cell.isOccupied():
cell.setToX()
return True
else:
return False

def setCelltoO(self, cell_number):
cell = self.__mycells[cell_number]
if not cell.isOccupied():
cell.setToO()
return True
else:
return False

def isTied(self):
for cell in self.__mycells:
if not cell.isOccupied():
return False
return True

def gameWon(self):
for cell in self.__mycells:
#horizontals
if (cell % 3 == 0) and (self.__mycells[cell] ==
self.__mycells[cell + 1]) and (self.__mycells[cell + 1]==
self.__mycells[cell + 2]):
return True
#verticals
elif (cell < 3) and (self._mycells[cell] == self._mycells[cell +
3]) and (self._mycells[cell] == self.__mycells[cell + 6]):
return True
#diagonals
elif (cell == 0) and (self.__mycells[cell] ==
self.__mycells[cell + 4]) and (self.__mycells[cell] == self.__mycells[cell +
8]):
return True
elif (cell == 2) and (self.__mycells[cell] ==
self.__mycells[cell + 2]) and (self.__mycells[cell] == self.mycells[cell +
4]):
return True
return False


class Cell:

def __init__(self):
self.__value = " "

def setToX(self):
self.__value = "X"

def setToO(self):
self.__value = "O"

def print1(self):
print(self.__value,)
#add a predicate (start in terms of question, not action)
def isOccupied(self):
return not self.__value == " "

def main():
#initialize game
#draw board
#create two players
#enter a loop-- prompt each player for a loop...stops when a player wins
or a tie
board = Board()
board.print1()
pX = Player("Ben", "X")
pO = Player("Sam", "O")
while not board.gameWon() and not board.isTied():
c1 = pX.move()
success = board.setCellToX(c1)
while not success:
c1 = pX.move()
success = board.setCellToX(c1)
board.print1()
c1 = pO.move()
success = board.setCellToO(c1)
while not success:
c1 = pO.move()
success = board.setCellToO(c1)
board.print1()
print("Game Over")



if __name__ == "__main__":
main()
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[Tutor] Problem recognizing '{' character?

2011-03-28 Thread Ben Hunter

Hi,

I'm completing the Python lessons on YouTube that Google posted. At the end
of section 2 of day 2, there is a task to identify files then put them in a
zip file in any directory. The code is from the 'solution' folder, so it's
not something I wrote. I suspect I have a problem with PATHS or environment
variables. I'm new to programming in something as advanced as Python, but I
do okay with VBA - so I just feel like there's a setting up issue somewhere.
I'm on Windows 7, tried running this in Idle and from the command line.

These two work perfectly.

def get_special_paths(dirname):
  result = []
  paths = os.listdir(dirname)  # list of paths in that dir
  for fname in paths:
match = re.search(r'__(\w+)__', fname)
if match:
  result.append(os.path.abspath(os.path.join(dirname, fname)))
  return result


def copy_to(paths, to_dir):
  if not os.path.exists(to_dir):
os.mkdir(to_dir)
  for path in paths:
fname = os.path.basename(path)
shutil.copy(path, os.path.join(to_dir, fname))

This third one does not.

def zip_to(paths, zipfile):
  """Zip up all of the given files into a new zip file with the given
name."""
  cmd = 'zip -j ' + zipfile + ' ' + ' '.join(paths)
  print "Command I'm going to do:" + cmd
  (status, output) = commands.getstatusoutput(cmd)
  # If command had a problem (status is non-zero),
  # print its output to stderr and exit.
  if status:
sys.stderr.write(output)
sys.exit(1)

My command is this: >>> copyspecial.zip_to(paths, 'zippy')

But something goes wrong and it spits this out:
'{' is not recognized as an internal or external command,
operable program or batch file.
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Re: [Tutor] Problem recognizing '{' character?

2011-03-29 Thread Ben Hunter

Thanks a ton. For the record I did read the 'command' module help page, but
must have skipped over the 'Platforms: Unix' and 'Deprecated' parts. I
successfully got it to work with the subprocess module, but I really
appreciate you filling out the rest with the sys.stderr.write(stderrdata). I
certainly would have stumbled over that.

-BJH


On Mon, Mar 28, 2011 at 8:12 PM, Ben Hunter  wrote:

> Hi,
>
> I'm completing the Python lessons on YouTube that Google posted. At the end
> of section 2 of day 2, there is a task to identify files then put them in a
> zip file in any directory. The code is from the 'solution' folder, so it's
> not something I wrote. I suspect I have a problem with PATHS or environment
> variables. I'm new to programming in something as advanced as Python, but I
> do okay with VBA - so I just feel like there's a setting up issue somewhere.
> I'm on Windows 7, tried running this in Idle and from the command line.
>
> These two work perfectly.
>
> def get_special_paths(dirname):
>   result = []
>   paths = os.listdir(dirname)  # list of paths in that dir
>   for fname in paths:
> match = re.search(r'__(\w+)__', fname)
> if match:
>   result.append(os.path.abspath(os.path.join(dirname, fname)))
>   return result
>
>
> def copy_to(paths, to_dir):
>   if not os.path.exists(to_dir):
> os.mkdir(to_dir)
>   for path in paths:
> fname = os.path.basename(path)
> shutil.copy(path, os.path.join(to_dir, fname))
>
> This third one does not.
>
> def zip_to(paths, zipfile):
>   """Zip up all of the given files into a new zip file with the given
> name."""
>   cmd = 'zip -j ' + zipfile + ' ' + ' '.join(paths)
>   print "Command I'm going to do:" + cmd
>   (status, output) = commands.getstatusoutput(cmd)
>   # If command had a problem (status is non-zero),
>   # print its output to stderr and exit.
>   if status:
> sys.stderr.write(output)
> sys.exit(1)
>
> My command is this: >>> copyspecial.zip_to(paths, 'zippy')
>
> But something goes wrong and it spits this out:
> '{' is not recognized as an internal or external command,
> operable program or batch file.
>
>
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[Tutor] Data frame packages

2011-03-31 Thread Ben Hunter

Is anybody out there familiar with data frame modules for python that will
allow me to read a CSV in a similar way that R does? pydataframe and
DataFrame have both befuddled me. One requires a special stripe of R that I
don't think is available on windows and the other is either very buggy or
I've put it in the wrong directory / installed incorrectly. Sorry for the
vague question - just taking the pulse. I haven't seen any chatter about
this on this mailing list.
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Re: [Tutor] Data frame packages

2011-03-31 Thread Ben Hunter

I appreciate all the responses and apologize for not being more detailed. An
R data frame is a tightly grouped array of vectors of the same length. Each
vector is all the same datatype, I believe, but you can read all types of
data into the same variable. The benefit is being able to quickly subset,
stack and such (or 'melt' and 'cast' in R vernacular) according to any of
your qualitative variables (or 'factors'). As someone pretty familiar with R
and quite a newbie to python, I'm wary of insulting anybody's intelligence
by describing what to me is effectively the default data format my most
familiar language. The following is some brief R code if you're curious
about how it works.

d <- read.csv(filename, header = TRUE, sep = ',') #this reads the table.
'<-' is the assignment operator
d[ , 'column.name'] # this references a column name. This same syntax can be
used to reference all rows (index is put left of the comma) and columns in
any order.

The data frame then allows you to quickly declare new fields as functions of
other fields.
newVar <- d[ ,'column.name'] + d[ ,'another.column']
d$newVar <- newVar # attaches newVar to the rightmost column of 'd'

At any rate, I finally got pydataframe to work, but had to go from Python
2.6 to 2.5. pydataframe has a bug for Windows that the author points out.
Line 127 in 'parsers.py' should be changed from:
columns = list(itertools.izip_longest(*split_lines ,fillvalue = na_text))

to:
columns = list(itertools.izip_longest(list(*split_lines),fillvalue =
na_text))

I don't know exactly what I did, but the module would not load until I did
that. I know itertools.izip_longest requires 2 arguments before fillvalue,
so I guess that did it.

It's a handy way to handle alpha-numeric data. My problem with the csv
module was that it interpreted all numbers as strings.

Thanks again.

On Thu, Mar 31, 2011 at 8:17 AM, James Reynolds  wrote:

>
>
> On Thu, Mar 31, 2011 at 11:10 AM, Blockheads Oi Oi <
> breamore...@yahoo.co.uk> wrote:
>
>> On 31/03/2011 09:38, Ben Hunter wrote:
>>
>>> Is anybody out there familiar with data frame modules for python that
>>> will allow me to read a CSV in a similar way that R does? pydataframe
>>> and DataFrame have both befuddled me. One requires a special stripe of R
>>> that I don't think is available on windows and the other is either very
>>> buggy or I've put it in the wrong directory / installed incorrectly.
>>> Sorry for the vague question - just taking the pulse. I haven't seen any
>>> chatter about this on this mailing list.
>>>
>>>
>>>
>> What are you trying to achieve?  Can you simply read the data with the
>> standard library csv module and manipulate it to your needs?What makes
>> you say that the code is buggy, have you examples of what you tried and
>> where it was wrong?  Did you install with easy_install or run setup.py?
>>
>>
>>
>>> ___
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>>>
>>
>> Regards.
>>
>> Mark L.
>>
>>
>>
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>>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
> I'm not familiar with it, but what about http://rpy.sourceforge.net/
>
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>
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[Tutor] installing where does my money go

2011-04-07 Thread Ben Teeuwen

Hi everyone, 

I'm a total newbie giving his best shot at visualising local educational 
institution's faculty budget (over 60 million) to stir up some healthy 
democratic debate, by trying to adapt the code from 
http://wheredoesmymoneygo.org/getting-started/. Its open source, so I'm trying 
out how far I'll wind up :).

I'm installing the setup below (see 
http://wheredoesmymoneygo.org/getting-started/).
I've got a mac os 10.6.7, python 2.7.1, pip, and the most recent postgres 
installation. 

I get stuck at;
"Run setup.py to install all required local packages. (Needs more details...)"

bteeuwen@Ben-3 ~/Sites/wdmmg]$./setup.py
from: can't read /var/mail/setuptools
from: can't read /var/mail/wdmmg
./setup.py: line 4: syntax error near unexpected token `newline'
./setup.py: line 4: `setup('

Then I added this to setup.py:
#!/usr/bin/python

This is where I end:
bteeuwen@Ben-3 ~/Sites/wdmmg]$./setup.py
/System/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/distutils/dist.py:266:
 UserWarning: Unknown distribution option: 'paster_plugins'
  warnings.warn(msg)
usage: setup.py [global_opts] cmd1 [cmd1_opts] [cmd2 [cmd2_opts] ...]
   or: setup.py --help [cmd1 cmd2 ...]
   or: setup.py --help-commands
   or: setup.py cmd --help

Anyone any advice where to look for answers? Thx!!

Ben

__

sInstallation and Setup
==

Steps to set up WDMMG from scratch. May not be comprehensive, please edit.

--

Install Postgres (or any other sqlalchemy compatible DB) on your machine.
Create a new database called 'production', add a superuser: note down the
username and password.

  $ sudo -u postgres createuser -P nameofuser
  $ sudo -u postgres createdb --owner nameofuser nameofdb

--

Check out wdmmg from the Mercurial repository. 

$ hg clone http://knowledgeforge.net/okfn/wdmmg

[OUTDATED: For info: This will create a "wdmmg" directory with everything in 
it. Inside,
you will find:

 - "doc": self-explanatory.
 - "econdata": source code for some fo our data packages.
 - "wdmmg": source code for the data store.
 - "wdmmgrdf": version of the data store with an RDF backend (dormant).
 - "flash": source code for the dashboard.

Inside "wdmmg/wdmmg" you will find a pretty standard Pylons application. Thex
main part is a Python package called (you guessed it) "wdmmg". So the actual
code is inside "wdmmg/wdmmg".]

--

Run setup.py to install all required local packages. (Needs more details...)

--

Install 'wdmmg' using pip. NB {your-pyenv] here means
'the location of your virtualenv if you have one'::

$ pip -E {your-pyenv} install -r pip-requirements.txt

--

Create a config file called development.ini (this has the config options needed
to run the site locally): 

$ paster make-config wdmmg development.ini

--

Edit development.ini with Solr and SQLAlchemy details for your local machine: 

solr.url = url of remote Solr script (can be found in .ini files 
on servers), or just 'stub' if you prefer

sqlalchemy.url = postgres://username:password@localhost/production

--

Sync the database tables and set up the application:

$ paster setup-app development.ini

--

For data store theme:

Get main wdmmg theme files from the mercurial repository at::

  http://bitbucket.org/okfn/wdmmg-wp-theme

And put them at::

  wdmmg/public/themes/wdmmg

--

Install some data (not sure if this really belongs here?)

$ chmod a+x install_data.sh
$ ./install_data.sh

--

Run tests, edit anything that is broken::

$ nosetests 

--

Load fixtures so you have some sample data::

$ paster fixtures setup 

[
Alternatively, if you want the full datasets, run the install_data script 
(slow)::

  $ chmod a+x install_data.sh
  $ ./install_data.sh

]

--

Finally, run the site from development.ini::

  $ paster serve --reload development.ini

--

Start hacking!

Trac repository: 
http://knowledgeforge.net/okfn/tasks/query?status=assigned&status=new&status=reopened&component=projects.wdmmg&order=priority&col=id&col=summary&col=cc&col=status&col=owner&col=type&col=priority


How to Upgrade Production Service
=

3 dbs/systems:
  * data.wheredoesmymoneygo.org - P1
  * data.wheredoesmymoneygo.org.2 - P2
  * data.staging.wheredoesmymoneygo.org - S1

Suppose P1 = active production, P2 = inactive production

  * Shut down write to the main system (Hack way: LimitExcept GET in Apache)
  * Dump active production db and load into inactive production db
  * Upgrade inactiv

[Tutor] ImportError: No module named wdmmgext.load

2011-04-11 Thread Ben Teeuwen

Hi, 

Thanks Emile van Sebille for answering my last question.
I'm now testing my imported data and I get 21 errors (see attached). The 
majority sounds like:

from wdmmgext.load import uganda
ImportError: No module named wdmmgext.load

I've searched the files that use this module. Attached is an example file.

I see 2 more errors;
1) that the file 'ukgov-finances-cra/cra_2009_db.csv' does not exist. 
2) SolrException: HTTP code=404, reason=Not Found
Maybe both are due to the wdmmgext.load error, so I'll ignore this for now and 
first try to find answer to my first question.

Thanks in advance for the help!

Ben

import json
import os
import pkg_resources
import wdmmg.model as model
from wdmmgext.load import uganda

class TestDepartments(object):

@classmethod
def setup_class(self):
model.repo.delete_all()
model.Session.remove()
self.name = uganda.dataset_name
filepath = 'wdmmg/tests/uganda_sample.xls'
test_file = os.path.abspath(filepath)
uganda.load_files(filename=test_file, commit_every=10)
model.Session.commit()
model.Session.remove()

@classmethod
def teardown_class(self):
model.repo.delete_all()
model.Session.commit()
model.Session.remove()

# check dataset exists
def test_01_dataset(self):
out = (model.Session.query(model.Dataset)
.filter_by(name=self.name)
).first()
assert out, out

# Get our keys, and check values exist for them.
def test_02_classification(self):
for key_name in [u'from', u'time', u'uganda_id', u'gou_vote',
u'vote_name', u'project_code', u'project_name', 
u'funded_by_donor',
u'funded_by_govt', u'mtef_sector', u'mtef_reference', 
u'swg', u'sector_objective', u'peap1_pillar', 
u'peap2_objective', u'peap3_area']:
key = 
model.Session.query(model.Key).filter_by(name=key_name).first()
assert key, key_name
count = (model.Session.query(model.ClassificationItem)
.join(model.EnumerationValue)
.filter_by(key=key)
).count()
assert count, (key_name, count)

# Check there are some entries and none of them are null
def test_03_entry(self):
dataset_ = (model.Session.query(model.Dataset)
.filter_by(name=self.name)
).one()
count = (model.Session.query(model.Entry)
.filter_by(dataset_=dataset_)
).count()
assert count, 'There are no Entries'
assert not (model.Session.query(model.Entry)
.filter_by(dataset_=dataset_)
.filter_by(amount=None)
).first(), 'Some Entries have NULL amounts'

# Look for a 'to' field on the first entry in the dataset.
def test_04_entry_to(self):
dataset_ = (model.Session.query(model.Dataset)
.filter_by(name=self.name)
).one()
txn = (model.Session.query(model.Entry)
.filter_by(dataset_=dataset_)
).first()
classif = txn.classification_as_dict()
print classif['to']
assert classif['to'] == 'uganda-society'
EE....EEE
==
ERROR: test suite for 
--
Traceback (most recent call last):
  File 
"/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/nose/suite.py",
 line 208, in run
self.setUp()
  File 
"/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/nose/suite.py",
 line 291, in setUp
self.setupContext(ancestor)
  File 
"/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/nose/suite.py",
 line 314, in setupContext
try_run(context, names)
  File 
"/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/nose/util.py",
 line 478, in try_run
return func()
  File "/Users/bteeuwen/Sites/wdmmg/wdmmg/tests/functional/test_aggregate.py", 
line 8, in setup_class
Fixtures.setup()
  File "/Users/bteeuwen/Sites/wdmmg/wdmmg/lib/cli.py", line 101, in setup
from wdmmgext.load import cofog
ImportError: No module named wdmmgext.load
 >> begin captured logging << 
pylons.configuration: DEBUG: Initializing configuration, package: 'wdmmg'
pylons.configuration: DEBUG: Pushing process configuration
pylons.configuration: DEBUG: Adding mako engine with alias None and 
{'myghty.data_dir': &

[Tutor] ImportError: No module named wdmmgext.load

2011-04-15 Thread Ben Teeuwen

Hi, 

I'm trying to install the code from 
http://wheredoesmymoneygo.org/getting-started/ on my local machine. I've got a 
mac os 10.6.7, python 2.7.1, pip, and the most recent postgres installation. 
I'm now testing imported data and I get 21 errors (see attached). The majority 
sounds like:

   from wdmmgext.load import uganda
ImportError: No module named wdmmgext.load

I've searched the files that use this module. Attached is an example file.

I see 2 more errors;
1) that the file 'ukgov-finances-cra/cra_2009_db.csv' does not exist. 
2) SolrException: HTTP code=404, reason=Not Found
Maybe both are due to the wdmmgext.load error, so I'll ignore this for now and 
first try to find answer to my first question.

Thanks in advance for the help!

Ben

import json
import os
import pkg_resources
import wdmmg.model as model
from wdmmgext.load import uganda

class TestDepartments(object):

@classmethod
def setup_class(self):
model.repo.delete_all()
model.Session.remove()
self.name = uganda.dataset_name
filepath = 'wdmmg/tests/uganda_sample.xls'
test_file = os.path.abspath(filepath)
uganda.load_files(filename=test_file, commit_every=10)
model.Session.commit()
model.Session.remove()

@classmethod
def teardown_class(self):
model.repo.delete_all()
model.Session.commit()
model.Session.remove()

# check dataset exists
def test_01_dataset(self):
out = (model.Session.query(model.Dataset)
.filter_by(name=self.name)
).first()
assert out, out

# Get our keys, and check values exist for them.
def test_02_classification(self):
for key_name in [u'from', u'time', u'uganda_id', u'gou_vote',
u'vote_name', u'project_code', u'project_name', 
u'funded_by_donor',
u'funded_by_govt', u'mtef_sector', u'mtef_reference', 
u'swg', u'sector_objective', u'peap1_pillar', 
u'peap2_objective', u'peap3_area']:
key = 
model.Session.query(model.Key).filter_by(name=key_name).first()
assert key, key_name
count = (model.Session.query(model.ClassificationItem)
.join(model.EnumerationValue)
.filter_by(key=key)
).count()
assert count, (key_name, count)

# Check there are some entries and none of them are null
def test_03_entry(self):
dataset_ = (model.Session.query(model.Dataset)
.filter_by(name=self.name)
).one()
count = (model.Session.query(model.Entry)
.filter_by(dataset_=dataset_)
).count()
assert count, 'There are no Entries'
assert not (model.Session.query(model.Entry)
.filter_by(dataset_=dataset_)
.filter_by(amount=None)
).first(), 'Some Entries have NULL amounts'

# Look for a 'to' field on the first entry in the dataset.
def test_04_entry_to(self):
dataset_ = (model.Session.query(model.Dataset)
.filter_by(name=self.name)
).one()
txn = (model.Session.query(model.Entry)
.filter_by(dataset_=dataset_)
).first()
classif = txn.classification_as_dict()
print classif['to']
assert classif['to'] == 'uganda-society'
EE....EEE
==
ERROR: test suite for 
--
Traceback (most recent call last):
  File 
"/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/nose/suite.py",
 line 208, in run
self.setUp()
  File 
"/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/nose/suite.py",
 line 291, in setUp
self.setupContext(ancestor)
  File 
"/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/nose/suite.py",
 line 314, in setupContext
try_run(context, names)
  File 
"/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/nose/util.py",
 line 478, in try_run
return func()
  File "/Users/bteeuwen/Sites/wdmmg/wdmmg/tests/functional/test_aggregate.py", 
line 8, in setup_class
Fixtures.setup()
  File "/Users/bteeuwen/Sites/wdmmg/wdmmg/lib/cli.py", line 101, in setup
from wdmmgext.load import cofog
ImportError: No module named wdmmgext.load
 >> begin captured logging << 
pylons.configuration: DEBUG: Initializing configuration, package: 'wdmmg'
pylons.configuration: DEBUG: Pushin

Re: [Tutor] running more than one python program at the same time

2012-08-28 Thread Ben Fishbein

I'm on a Mac. Using Lion. I just tried opening the terminal and typing
"python." And I'm able to open several terminal windows this way. I think
this should be able to run many programs simultaneously. Thanks for your
help.
-Ben


On Tue, Aug 28, 2012 at 6:04 PM, Brian van den Broek <
brian.van.den.br...@gmail.com> wrote:

>
> On 28 Aug 2012 18:33, "Benjamin Fishbein"  wrote:
> >
> > Hello,
> > I wrote a program that I want to have running 24/7. But the problem is
> that I also want to write and run other programs. I'm using Idle and it
> won't let me run more than one script at a time. Do you know if there's a
> way to do this? Or do I need to buy a second computer?
> > Thanks,
> > Ben
>
> Hi Ben,
>
> Idle may be useful for developing with (provided you aren't making an app
> with tkinter) but isn't always the best choice for running one.
>
> Do you know how to run python from a command prompt? (If not, post back to
> the list being sure to tell us your OS and I or someone else will help
> you.) If you run you 24/7 program that way, idle will be free for you to
> work. There are other ways to get your program to run in the background,
> but again these are OS-dependant.
>
> Best,
>
> Brian vdB
>
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Re: [Tutor] running more than one python program at the same time

2012-08-28 Thread Ben Fishbein

Stupid question: how do I run a program from the terminal? I've always just
gone to the drop down menu and clicked run to do it in idle.

On Tue, Aug 28, 2012 at 6:17 PM, Ben Fishbein  wrote:

> I'm on a Mac. Using Lion. I just tried opening the terminal and typing
> "python." And I'm able to open several terminal windows this way. I think
> this should be able to run many programs simultaneously. Thanks for your
> help.
> -Ben
>
>
> On Tue, Aug 28, 2012 at 6:04 PM, Brian van den Broek <
> brian.van.den.br...@gmail.com> wrote:
>
>>
>> On 28 Aug 2012 18:33, "Benjamin Fishbein"  wrote:
>> >
>> > Hello,
>> > I wrote a program that I want to have running 24/7. But the problem is
>> that I also want to write and run other programs. I'm using Idle and it
>> won't let me run more than one script at a time. Do you know if there's a
>> way to do this? Or do I need to buy a second computer?
>> > Thanks,
>> > Ben
>>
>> Hi Ben,
>>
>> Idle may be useful for developing with (provided you aren't making an app
>> with tkinter) but isn't always the best choice for running one.
>>
>> Do you know how to run python from a command prompt? (If not, post back
>> to the list being sure to tell us your OS and I or someone else will help
>> you.) If you run you 24/7 program that way, idle will be free for you to
>> work. There are other ways to get your program to run in the background,
>> but again these are OS-dependant.
>>
>> Best,
>>
>> Brian vdB
>>
>
>
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Re: [Tutor] How (not!) lengthy should functions be?

2015-04-16 Thread Ben Finney

boB Stepp  writes:

> My current understanding of function length best practice is that: 1)
> Each function should have preferably ONE clearly defined purpose.

Yes, that's a principle to follow firmly, improving the design every
time. I know of no exceptions.

“Clearly defined” also entails the function signature (its name, what
parameters it accepts, what return value it emits) is narrowly defined.

> 2) I have seen varying recommendations as to number of lines of code
> per function, but I have seem multiple recommendations that a function
> generally should fit into one screen on one's monitor.

A function that is clearly-designed, as above, should have no more than
a handful of statements. That's intentionally vague, but it's already
shorter than “a screenful”.

> Of course, some people have HUGE monitors! And I assume that any
> guidance applies equally well to methods.

Any function with statements stretching over 20 lines is already too
large, IMO.

Note that the docstring can be rather lengthy, if there is a lot to say
about the function's purpose or strange cases it handles.

> Am I on-track or am I getting carried away?

You're right to care about precision in your code. Overlong, overbroad,
overcomplex, overdetermined functions happen through laziness; it takes
diligence to keep the code readable through refactoring while you go.
That takes more effort at each edit, but saves a lot of debugging time.

Having such a principle in mind, and knowing that it's worth spending
effort to uphold, will serve you well.

-- 
 \ “Outside of a dog, a book is man's best friend. Inside of a |
  `\dog, it's too dark to read.” —Groucho Marx |
_o__)  |
Ben Finney

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Re: [Tutor] lists, name semantics

2015-04-17 Thread Ben Finney

Bill Allen  writes:

> If I have a list defined as my_list = ['a','b','c'], what is the is
> differnce between refering to it as my_list or my_list[:]?

‘my_list’ is a reference to the object you've already described (the
existing object ‘['a', 'b', 'c']’).

‘my_list[:]’ is an operation that takes the original object and creates
a new one by slicing. In this case, the new object happens to be equal
to (but probably not identical to) the original, because of the slice
you specified.

> Is there any nuance I am missing here? Situations where one form
> should be used as opposed to the other?

You need to understand, when writing code, whether you are intending to
refer to the original object, or to create a new one. Neither is better,
they are both common but different operations.

-- 
 \  “Our products just aren't engineered for security.” —Brian |
  `\ Valentine, senior vice-president of Microsoft Windows |
_o__)development, 2002 |
Ben Finney

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Re: [Tutor] lists, name semantics

2015-04-17 Thread Ben Finney

Ben Finney  writes:

> Bill Allen  writes:
>
> > If I have a list defined as my_list = ['a','b','c'], what is the is
> > differnce between refering to it as my_list or my_list[:]?
>
> ‘my_list’ is a reference to the object you've already described (the
> existing object ‘['a', 'b', 'c']’).
>
> ‘my_list[:]’ is an operation that takes the original object and
> creates a new one by slicing. In this case, the new object happens to
> be equal to (but probably not identical to) the original, because of
> the slice you specified.

To demonstrate how identity differs from equality, use the appropriate
comparison operators::

$ python3

>>> foo = ['a', 'b', 'c']

>>> bar = foo # Bind the name ‘bar’ to the same object.
>>> bar   # Show me the object referred to by ‘bar’.
['a', 'b', 'c']
>>> bar == foo# Is the object ‘bar’ equal to the object ‘foo’?
True
>>> bar is foo# Is ‘bar’ referring to the same object as ‘foo’?
True

>>> baz = foo[:]  # Slice ‘foo’, creating a new list; bind ‘baz’ to that.
>>> baz   # Show me the object referred to by ‘baz’.
['a', 'b', 'c']
>>> baz == foo# Is the object ‘baz’ equal to the object ‘foo’?
True
>>> baz is foo# Is ‘baz’ referring to the same object as ‘foo’?
False

References which compare identical *are the same* object, guaranteed.
Object identity almost always implies equality.

(“almost always” because some object types have unusual behaviour like
“the object is not equal to itself”. Don't fret about that though, these
exceptions are clearly defined when you find them.)

References which compare equal *may under some conditions* be identical.
This is *not* ever a promise, though, and you should never rely on it,
not even in the same session of a program.

Some of Python's internal optimisations depend on the fact that object
equality *does not* imply object identity. If you happen to notice some
operations producing the same object at one point in time, but the
documentation doesn't promise it, then treat that as an unpredictable
implementation detail and don't rely on it in your code.

-- 
 \   “The best in us does not require the worst in us: Our love of |
  `\ other human beings does not need to be nurtured by delusion.” |
_o__) —Sam Harris, at _Beyond Belief 2006_ |
Ben Finney

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Re: [Tutor] sample dictionairies

2015-04-19 Thread Ben Finney

Jim Mooney  writes:

> Where could I download Python sample dictionaries on different
> subjects.

I don't know what yoy mean by the “subject” of a dictionary.

A Python dict is a data structure. Its values can be any collection of
Python objects.

Is the “subject” of a dictionary its meaning? Its meaning is entirely up
to whoever wrote it and whoever reads it.

So I have to guess that you mean something else. What do you mean by
“dictionaries on different subjects”?

-- 
 \“Technology is neither good nor bad; nor is it neutral.” |
  `\   —Melvin Kranzberg's First Law of Technology |
_o__)      |
Ben Finney

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Re: [Tutor] Life Grid Implementation

niy mor  writes:

> Is my code completing the assignment???

Does it meet the requirements when you (and other people) run the code?

> I need some *guidance* on completing my assignment.

Can you be specific about what you don't understand?

If you don't understand the requirements, that is best discussed with
your course supervisor, not us.

-- 
 \   “Kissing a smoker is like licking an ashtray.” —anonymous |
  `\   |
_o__)      |
Ben Finney

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Re: [Tutor] sample dictionairies

Jim Mooney  writes:

> I should have known to simply try importing csv.

Better: You should now know to refer to the documentation
https://docs.python.org/3/library/>.

-- 
 \  “Speech is conveniently located midway between thought and |
  `\action, where it often substitutes for both.” —John Andrew |
_o__)  Holmes, _Wisdom in Small Doses_ |
Ben Finney

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Re: [Tutor] introspection

Alex Kleider  writes:

> Does python provide the introspective ability to retrieve the name to
> which an object is bound?

Objects aren't bound to names. So, no.

The binding from a reference (a name is a reference) to objects is
one-way.

See this excellent presentation from PyCon US 2015 by Ned Batchelder
https://www.youtube.com/watch?v=_AEJHKGk9ns>.

-- 
 \ “I must say that I find television very educational. The minute |
  `\   somebody turns it on, I go to the library and read a book.” |
_o__)—Groucho Marx |
Ben Finney

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Re: [Tutor] bin to dec conversion puzzlement