[Tutor] Guidance on jump-starting to learn Python
I have the challenge / opportunity to learn Python quickly. I am technically-minded, but I am not a programmer. When I have tried / used Python before (I've written 5-6 python programs/utilities), it has been solving a particular issue but not learning the proper structure/procedures to learn Python (nor any other programming language). I humbly admit I have cut corners, so I have bad habits. I have been advised to start with the basics but at an accelerated pace. Any recommended "homework" assignments? I have two books as well: Core Python Programming from Wesley Chun , Second Edition. Python Programming for the Absolute Beginner, Second Edition. Thanks so much for your advice/help in advance. Steve ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
[Tutor] Online class/education for Python?
Anyone taken or know of any online classes teaching Python? I know O'Reilly Press teaches online technical courses, through the University of Illinois, but no Python . Thanks. Steve ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Online class/education for Python?
Joe, It's an online class without a specific time. The class runs for six weeks with two assignments per week. Steve On Sun, Jul 20, 2008 at 3:51 PM, Joe Bennett <[EMAIL PROTECTED]> wrote: > What time where the classes? Web site seems to be missing that info... > > > -Joe > > > > On Sun, Jul 20, 2008 at 1:08 AM, Dick Moores <[EMAIL PROTECTED]> wrote: > > At 02:45 PM 7/19/2008, David wrote: > >> > >> Steve Poe wrote: > >>> > >>> Anyone taken or know of any online classes > >>> teaching Python? I know O'Reilly Press > >>> teaches online technical courses, through the University of > >>> Illinois, but no Python > >>> . > >>> > >>> Thanks. > >>> > >>> Steve > >>> > > >>> > >>> ___ > >>> Tutor maillist - Tutor@python.org > >>> http://mail.python.org/mailman/listinfo/tutor > >>> > >> I am new to Python so this one was pretty good for me; > >> > >> > http://www.ed2go.com/cgi-bin/ed2go/newcrsdes.cgi?course=ipy&title=Introduction > ^to^Python^2.5^Programming&departmentnum=WP&path=1 > > > > This does look good. I'm thinking about the $129. > > > > 1. Is there a problem set for each lesson? Are they corrected or > commented > > on? > > 2. How do you ask for help from the instructor? By email? In a forum? Was > he > > helpful? > > > > Thanks, > > > > Dick Moores > > > === > > Have you seen Kelie Feng's video introducing the terrific and free IDE, > > Ulipad? Download it from my website. > > <http://www.rcblue.com/u3/> Get Ulipad 3.9 from > > <http://code.google.com/p/ulipad/downloads/list> > > Use svn for the latest revision <http://ulipad.googlecode.com/svn/trunk/ > > > > Mailing list for Ulipad: <http://groups-beta.google.com/group/ulipad> > > ___ > > Tutor maillist - Tutor@python.org > > http://mail.python.org/mailman/listinfo/tutor > > > ___ > Tutor maillist - Tutor@python.org > http://mail.python.org/mailman/listinfo/tutor > ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
[Tutor] understanding join
Hi tutor list, Just trying to add some clarity to the built-in function strings using join. The Python help screen says it returns a string which is a concatenation of strings in sequence. I am concatenating the string I am working on that maybe an issue of its own. Here's my example: string ='ab' so, if I type: print string.join(string) aabb but if string is 'abc' print string.join(string) aabcbabcc print string ='a' returns on a in this example, whit string='a ' returns aa. So, I am not catching the pattern. Thanks. Steve ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] checking for expected types from input file
Bryan,
How about checking your input to see if they are digits or not?
>>> input_data = '123ABC'
>>> print input_data.isdigit()
False
>>> input_data = '1234567889'
>>> print input_data.isdigit()
True
>>> input_data = '123ABC'
>>> print input_data.isdigit()
False
or something like:
while INPUT.has_key('ReferencePositionX').isdigit() =='True':
refx = float(INPUT['ReferencePositionX'])/10
refy = float(INPUT['ReferencePositionY'])/10
refz = float(INPUT['ReferencePositionZ'])/10
Steve
On Jul 30, 2008, at 6:43 PM, Bryan Fodness wrote:
I am populating a dictionary from an input file, and would like to
create an error code if a string is sent to a variable that expects
a float or int.
INPUT = {}
for line in open(infile):
input_line = line.split(' = ')
INPUT[input_line[0].strip()] = input_line[1].strip()
if INPUT.has_key('ReferencePositionX'):
refx = float(INPUT['ReferencePositionX'])/10
refy = float(INPUT['ReferencePositionY'])/10
refz = float(INPUT['ReferencePositionZ'])/10
I have many variables of different types, and I want to do a check
in case something like ReferencePositionX = abc occurs.
--
"The game of science can accurately be described as a never-ending
insult to human intelligence." - João Magueijo
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Re: [Tutor] understanding join
Does this look useful? In [3]: people = [ 'Tom', 'Dick', 'Harry' ] In [4]: ', '.join(people) Out[4]: 'Tom, Dick, Harry' Your confusion is in thinking about the string 'ABC' as a single entity. For the purposes of join(), it is a sequence of three letters. The argument to join() is a sequence of strings, not a single string. Kent Kent, Your explanation about my confusion is right on target. Thank you! Okay, now let's join people to people and what do we get? Steve ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] understanding join
Say I have a sequence seq and a string s, and I call s.join(seq).
Here's what it does:
s.join(seq) == seq[0] + s + seq[1] + s + seq[2] + s + ... + seq[-2] +
s + seq[-1]
So if you call 'abc'.join('ABC'), you get:
'ABC'[0] + 'abc' + 'ABC'[1] + 'abc' + 'ABC'[2]
which is:
'A' + 'abc' + 'B' + 'abc' + 'C'
Hope this helps.
--
John.
John,
Your explanation is very help. It does make be wonder the usefulness
of join with strings. Do you have a practical example/situation?
Steve
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[Tutor] key/value order in dictionaries
Hi tutor list,
In dictionaries, I know that the keys are immutable, and the values
can change What about the place/order of the key/order? I thought
that they were sequential and they do not change.
>>> D={"AAA":1234,"BBB":3456,"CCC":7890}
>>> print D
{'AAA': 1234, 'BBB': 3456, 'CCC': 7890}
>>> D={}
>>> D={"AAA":1234,"BBB":3456,"CCC":7890,"DDD":,"EEE":,"FFF":
}
>>> print D
{'AAA': 1234, 'BBB': 3456, 'EEE': , 'FFF': , 'CCC': 7890,
'DDD': }
If I know the key, then I can find the value, so the order it is in
the dictionary
should not matter. I am just curious why this happens. If I have (4)
key/value
pairs, the display order is the same as I entered the them. With 5 or
more key/value
dictionaries, the printed result is not sequential.
Any thoughts?
Steve
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Re: [Tutor] Scan Directory for files
Fred,
What is/are the exact error message(s)?
You may want to look at the module glob.
Steve
Ar e you typing this in the python interpreter or
On Aug 1, 2008, at 10:41 PM, Fred @ Mac wrote:
Hello,
new to python, so please go easy on me!
I am using
for f in os.listdir(watch_dir):
tree = ET.parse(f)
for shot in tree.findall('Shot'):
..do stuff..
to scan a directory for specific files (xml files specifically).
But my script fails if, for example, a directory also exists in
"watch_dir"
How can i restructure this so it only returns a list of the .xml
files in that directory, ignores other files and or directories in
"watch_dir"
Thanks!
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Re: [Tutor] pexpect
James,
I've not used pexpect, but I've done this on a Cisco switch. I found
using
time.sleep and read_until of the telnet class to be helpful.
10 tn = telnetlib.Telnet('')
11 #tn.set_debuglevel(9)
12 tn.read_until('Username: \xff', 5)
13 time.sleep(10)
14 tn.write('\n')
15 tn.read_until('\r\nPassword: ', 5)
16 #time.sleep(2)
17 tn.write('\n')
18 tn.read_until('#', 5)
19 tn.write('term len 0 \n')
20 tn.read_until('#', 5)
21 tn.write('show version | i restarted\n')
22 RouterStartupTimestamp = tn.read_until('#', 2)
23 tn.read_until('#', 2)
24 tn.write('show call history voice last 100\n')
HTH,
Steve
On Sep 20, 2008, at 8:43 AM, James wrote:
Folks,
Does anyone here have experience with pexpect? I'm trying to write a
pexpect script which will log into a network device, gather
statistics, and then dump the raw output into a file (or a string so
that I can manipulate it).
I'm not having much luck. Because the connection is telnet I was able
to use wireshark (a sniffer) to see the traffic between my computer
(which is running the pexpect script) and the network device.
Everything seems to go find until I "expect" the network device's
prompt and it just hangs. Eventually pexpect throws an exception and
times out.
I'd be happy to share some code when I get to the computer I've been
testing on. :) In the time being, has anyone seen a problem like this
before?
Thanks!
-j
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