On Aug 25, 2007, at 12:59 PM, Ara Kooser wrote:
> Hello all,
>
>I am working on trying to understand classes by creating a
> character generator for a rpg. I know I am doing something silly but I
> am not sure what. When I run the program I and type no when prompted I
> get the following messa
> Welcome to the wacky world of recursion.
> You call __upp from inside __upp so you do indeed generate
> a new layer, in fact you start a new while loop. You need to
> move the while loop out into init, something like this:
So all those "yes"s were actually backing out of multiple while
loops..
I wrote the stupid little script below for practice; it takes a text
file with a list of surnames, and returns a dictionary where the keys
are first letters of the names, and the values are lists of names
grouped under their appropriate first-letter key, like so:
{'A': ['Abercrombie'], 'B':
> From noob to noob : sort sorts in place. I seem to remember it
> returns nothing.
>
> This works:
>
> In [12]: directoryOut[12]:
> {'A': ['Abercrombie', 'Aalberg'],
> 'B': ['Barnaby', 'Black', 'Biggles'],
> 'D': ['Douglas', 'Dawn', 'Diggle'],
> 'G': ['Granger', 'Gossen']}
>
> In [13]: for key i
Whoa, this made my brain hurt. And I thought I was being clever using
a set...
I can't say I really understand this yet, but I'm trying. If anyone's
following along at home I found this link kind of helpful:
http://python.net/crew/mwh/hacks/setdefault.html
Thanks a lot for your help,
Eric
On Aug 28, 2007, at 11:07 AM, Che M wrote:
> I don't know if there are any preexisting Python structures which
> would help
> with this or if it has to be done by scratch, or if it is easy or
> difficult.
> I also don't know what are good ideas for ways to save the tags,
> whether
> in a t
> grid = [[1,1,2,7,6,9],\
> [,9,1,1,1,9,1],\
> [8,1,2,0,0,4],\
> [1,4,1,1,8,5]]
>
> how can i access to all the elements of the list from column no. 5.
>
> output should be like [6,9,0,8]...
Your basic tool is sub-indexing: you can reach items in the sub-lists
by us
>
> COL = 5
> [i[COL-1] for i in grid]
Should have guessed...
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When instantiating a class, is it possible for that instance to
'know' (via the __init__ method, I suppose) the name of the variable
it's been assigned to?
Thanks
E
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Tutor maillist - Tutor@python.org
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On Sep 17, 2007, at 7:21 PM, Alan Gauld wrote:
>
> "Eric Abrahamsen" <[EMAIL PROTECTED]> wrote
>
>> When instantiating a class, is it possible for that instance to
>> 'know' (via the __init__ method, I suppose) the name of the variable
>> it&#
> This is pretty hard. For one thing, the object will not be bound to
> a name until after __init__() is finished.
Ah, that's a good thing to know...
> you could probably use the stack frame to find the point of call
> and inspect the byte codes there to find the name...
I was afraid the ans
I'm trying to learn the fundamentals of cgi scripting, before moving
on to actually using the cgi module and, eventually, mod_python. I've
grasped that, if users submit a form to my cgi script, I can read the
form contents from os.environ['QUERY_STRING'] if it was stuck in the
URL via metho
Thanks for the detailed help. I'm dumping sys.stdin into a variable
at the very start now, and operating on that variable for everything
else, and all is well.
Thanks again,
E
On Oct 16, 2007, at 12:22 PM, Luke Paireepinart wrote:
> Eric Abrahamsen wrote:
>> I'm
On Nov 14, 2007, at 9:05 PM, Kent Johnson wrote:
> Roy Chen wrote:
>> Hello,
>>
>> I would like to write a simple script that would rename a bunch of
>> photos according to their creation date, i.e. the date which the
>> photo was taken.
>>
>> Is there a way to use Python to obtain that informatio
> And while I haven't tried it, this page (http://effbot.org/zone/pil-
> changes-114.htm) appears to indicate exif format is somewhat
> supported in PIL; perhaps pyexif does a better job though?
PIL does a pretty job, though it's a pain.
from PIL import Image
from PIL.ExifTags import TAGS
def get
I'm playing around with subclassing the built-in string type, and
realizing there's quite a bit I don't know about what's going on with
the built-in types. When I create a string like so:
x = 'myvalue'
my understanding is that this is equivalent to:
x = str('myvalue')
and that this second f
Thanks both of you, that cleared a lot of things up.
On Jan 9, 2008, at 11:49 AM, Kent Johnson wrote:
>
> No, you can't access the actual byte array from Python and you can't
> damage it.
I don't know a lick of C and probably never will, but I do like to
know what it is, exactly, that I don't
Can any PIL people out there tell me if it's possible to save a jpeg
image with exif data? I'm opening an image file, making changes to it,
and then resaving it: apparently calling save() chops off its exif
data, and there doesn't appear to be a way to re-attach it via a
parameter to the sa
mumber = 23
running = Ture
Both these lines have spelling errors: 'mumber' should be 'number',
and 'Ture' should be 'True'.
You can see where the problem is coming from by the end of your
traceback:
NameError: name 'Ture' is not defined
A NameError with something being 'not defined'
Hey, on this topic, I spent some time this afternoon googling the One
Laptop Per Child (OLPC) project (the GUI is done with Python and
PyGTK), to see if there were any collaborative open-source projects I
could contribute to. Seems like a perfect opportunity to get a little
more Python expe
on your PC:
> http://wiki.laptop.org/go/OS_images_for_emulation
>
> I was looking at Metropolis (the non-TM version of SimCity) as its gui
> is all written in python
>
> --Michael
>
>
>
> On 1/16/08, Eric Abrahamsen <[EMAIL PROTECTED]> wrote:
>> Hey,
configuration idjit.
I'll let you know how it goes. Will it conflict with an existing pyGTK
installation?
Both Snakes and Ladders and the pipelines thing sound potentially
interesting, I'll get back to you guys in a couple days...
Thanks!
Eric
>
>
> --Michael
>
> O
> Hi all,
>
> Returning to python after a brief affair with C++, I have the
> following code ...
>
>if (items.has_keys('snapshot_interval')):
>self.snap_init[i] = items['snapshot_interval']
>else:
>self.snap_init[i] = 0
>
> I
I have a grisly little sorting problem to which I've hacked together a
solution, but I'm hoping someone here might have a better suggestion.
I have a list of objects, each of which has two attributes, object_id
and submit_date. What I want is to sort them by content_type, then by
submit_date
ode I give produces
> the ordering that you intend, but you may adjust the sign of the
> decorate elements if necessary.
>
> With regard,
> Michael
>
> +---
> | Michael Goldwasser
> | Associate Professor
> | Dept. Mathematics and Computer Science
> | Saint Loui
On Mar 4, 2008, at 11:04 AM, Kent Johnson wrote:
> Eric Abrahamsen wrote:
>> Itertools.groupby is totally impenetrable to me
>
> Maybe this will help:
> http://personalpages.tds.net/~kent37/blog/arch_m1_2005_12.html#e69
>
> Kent
>
It did! Thanks very much. I think I
On Apr 18, 2008, at 8:01 AM, Hansen, Mike wrote:
> IMHO, I think before anyone jumps into using a framework, they should
> understand the basics of cgi programming. Maybe do just a small
> exercise with simple form processing. After that exercise, then move
> on to one of the frameworks that make
Hi all,
This is a syntax that I've seen on occasion in other people's code:
theme = (VALID_THEMES[0], theme) [ theme in VALID_THEMES ]
I have no idea how this works, or how to go about looking it up. Can
someone enlighten me as to what's happening here?
Many thanks,
Eric
___
Hello,
I'm trying to create a Dummy class of objects, something that will
return an empty string for any attribute. I'm making a very simple CMS
with Cherrypy/Sqlalchemy/Cheetah, and I have an HTML form template
that I use for editing/creating objects to save to the database. I'm
using ju
This creates an attribute named k; it does not create an attribute
whose name is the *value* of k. For that you need setattr:
setattr(self, k, v)
There is a shortcut that replaces the entire loop:
self.__dict__.update(atts)
Thanks Kent, that explains a lot about how things work.
return an e
I'm probably in over my head here, but I really want to know how this
works, and I hope someone will be willing to take a moment to explain
it...
I'm making a few classes for a very simple ORM, where the classes
reflect objects that I'm persisting via pickle. I'd like to add and
delete in
What you have almost works. Try this:
No kidding that's what I get for wild stabs in the dark, I thought
I'd tried that. I'm pleased that it really is that simple (and that,
whatever metaclasses are used for, I don't need to worry about them
yet).
Thanks!
Eric
(Grrr, bit by the reply
On Jul 2, 2008, at 12:36 PM, Christopher Spears wrote:
I'm working on problem 13-5 in Core Python Programming (2nd
Edition). I am supposed to create point class. Here is what I have
so far:
#!/usr/bin/python
class Point(object):
def __init__(self, x=0.0,y=0.0):
self.x = float(
As for other resources, I recently came across this:
http://farmdev.com/talks/unicode/
This was the first explanation that really made me understand the
difference between Unicode and utf-8 (and realize that I'd been using
the terms 'encode' and 'decode' backwards!). Anyway, just one more
r
I have a horribly stupid text parsing problem that is driving me
crazy, and making me think my Python skills have a long, long way to
go...
What I've got is a poorly-though-out SQL dump, in the form of a text
file, where each record is separated by a newline, and each field in
each record
I've been looking around for a good tutorial or background info on how
the Python runtime environment works, and haven't quite found what I'm
looking for. I started fooling with having different versions of
modules available to difference processes on a single server, which
led me to virtua
I've got a question about the way urllib2 makes its requests. If I've
got a python web framework running behind a web server, and that
framework uses urllib2 to make a request to another server, how does
that traffic go in and out of my server machine? The python docs say
that urllib2 requi
Thanks to you both. I'll read up on sockets, but it seems unlikely
that it works the way I thought it might...
On Aug 12, 2008, at 8:45 PM, Kent Johnson wrote:
On Tue, Aug 12, 2008 at 7:27 AM, Eric Abrahamsen
<[EMAIL PROTECTED]> wrote:
On Aug 11, 2008, at 6:54 PM, Kent Johnson
Hi,
I've got a problem that takes a bit of explaining, but it's relatively
simple when you get down to it. This is another django-related thing,
but the issue itself is pure python.
I made a custom class, called an EventEngine, which represents a span
of time. You initialize it with a que
On Aug 24, 2008, at 7:20 PM, Kent Johnson wrote:
Forwarding to the list with my reply. Please use Reply All to reply
to the list.
Grr, sorry, I keep forgetting...
On Sun, Aug 24, 2008 at 1:02 AM, Eric Abrahamsen
<[EMAIL PROTECTED]> wrote:
On Aug 23, 2008, at 11:22 PM, Kent J
break
self.sentinel += c.dt_range
if not require_events or c.has_events():
# if require_events == True, omit empty children.
yield c
On Aug 25, 2008, at 11:49 AM, Eric Abrahamsen wrote:
On Aug 24, 2008, at 7:20 PM, Kent Johnson wrote:
Forward
I do apologize for the large quantities of confusing description –
articulating the problem here has helped me understand exactly what it
is I'm after (though it hasn't improved my code!), and I've got a
better grasp of the problem now than I did when I first asked.
It isn't so much that I
On Aug 26, 2008, at 7:20 PM, Kent Johnson wrote:
On Tue, Aug 26, 2008 at 1:36 AM, Eric Abrahamsen
<[EMAIL PROTECTED]> wrote:
So my test case: a Month has a 'child' attribute pointing at Week,
which has
a 'child' attribute pointing at Day, so they all know what
7;s been a learning experience...
E
On Aug 27, 2008, at 2:22 AM, Kent Johnson wrote:
On Tue, Aug 26, 2008 at 1:24 PM, Eric Abrahamsen
<[EMAIL PROTECTED]> wrote:
On Aug 26, 2008, at 7:20 PM, Kent Johnson wrote:
If all you want to do with the nested Month, etc is to iterate the
even
On Nov 7, 2008, at 12:14 PM, [EMAIL PROTECTED] wrote:
Hi everyone,
I've been teaching myself python for a few months and I'm becoming
frustrated because I've kind of hit a wall in terms of learning new
information. In an effort to continue to learn I've found some
material on more interm
Hi there,
I'm configuring a python command to be used by emacs to filter a
buffer through python markdown, and noticed something strange. If I
run this command in the terminal:
python -c "import sys,markdown; print
markdown.markdown(sys.stdin.read().decode('utf-8'))" <
markdown_source.m
Hi there,
I'm trying to understand how module imports work, and am seeing some
behavior I don't understand:
>>> import django
>>> from django import forms
>>> from forms import DecimalField
Traceback (most recent call last):
File "", line 1, in
ImportError: No module named forms
>>> import
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