Re: [Tutor] OSError
Hi Chris,
I think I've found the problem. os.listdir() gives you all entries of
the directory, but your
not changing to that directory. The os.path.getsize() just does not find the
file in the directory testFiles under
your current directory.
See my short example below.
import os
os.listdir( trace )
['nbewer', 'installer_acb_2004-10-15.zip', 'epAnalyze.py', 'nbgene',
'ep20051201.txt', 'IPseconLinux.sxw', 'bbaseline', 'inner-classes.patch',
'jde-usages-0.9.1.zip', 'bleuch.ttf', 'privdebug']
os.getcwd()
'/users/trinomic/ewer'
import os.path
os.path.isfile ( epAnalyze.py )
False
os.path.isfile ( trace/epAnalyze.py )
True
HTH Ewald
Christopher Spears wrote:
I am trying to write a function that takes a directory
name and describes the contents of the directory (file
name and size) recursively. Here is what I have
written so far:
import os, os.path
def describeDirectory(directory):
if os.listdir(directory) == []:
print Empty directory!
else:
for files in os.listdir(directory):
if os.path.isdir(files):
print files, ' is a directory!'
else:
print files, 'SIZE: ',
os.path.getsize(files)
print 'Current Directory: \n'
describeDirectory('.')
print '\n'
print './testFiles: \n'
describeDirectory('./testFiles')
Here is the result:
Current Directory:
changePeppers.py SIZE: 915
describeDirectory.py SIZE: 481
describeDirectory.pyc SIZE: 514
error_log SIZE: 0
makezeros.py SIZE: 147
makezeros.pyc SIZE: 481
output SIZE: 387
pepper.txt SIZE: 601
testFiles is a directory!
textWrapper.py SIZE: 619
textWrapper.pyc SIZE: 1092
timings.py SIZE: 567
timings.pyc SIZE: 733
./testFiles:
renameFiles.py SIZE:
Traceback (most recent call last):
File describeDirectory.py, line 17, in ?
describeDirectory('./testFiles')
File describeDirectory.py, line 11, in
describeDirectory
print files, 'SIZE: ', os.path.getsize(files)
File /usr/lib/python2.4/posixpath.py, line 139, in
getsize
return os.stat(filename).st_size
OSError: [Errno 2] No such file or directory:
'renameFiles.py'
I don't understand the OSError. The file
'renameFiles.py' is in './testFiles' directory. Can
someone clarify this for me?
-Chris
I'm the last person to pretend that I'm a radio. I'd rather go out and be a
color television set.
-David Bowie
Who dares wins
-British military motto
I generally know what I'm doing.
-Buster Keaton
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Re: [Tutor] Help me please
yogeshwarran Nadeson wrote: Hello, I am a newbie in python programming without previous programming experience.Here i would like to ask a question based on the exercises given by Josh Cogliatti in his tutorial.I'll paste the question.Hope you can help me to solve it.I'd like to end it by saying thanks for all yourr help. Have you written a program that uses loops? Could you write a program that uses a loop to print Hello three times? Kent *:Modify the password guessing program to keep track of how many times the user has entered the password wrong. If it is more than 3 times, print ``That must have been complicated.'' * This is the previous password program: Password.py # Waits until a password has been entered. Use control-C to break out with out # the password #Note that this must not be the password so that the # while loop runs at least once. password = foobar #note that != means not equal while password != unicorn: password = raw_input(Password:) print Welcome in ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] OSError
Christopher Spears wrote:
I am trying to write a function that takes a directory
name and describes the contents of the directory (file
name and size) recursively. Here is what I have
written so far:
import os, os.path
def describeDirectory(directory):
if os.listdir(directory) == []:
print Empty directory!
else:
for files in os.listdir(directory):
if os.path.isdir(files):
print files, ' is a directory!'
else:
print files, 'SIZE: ',
os.path.getsize(files)
print 'Current Directory: \n'
describeDirectory('.')
print '\n'
print './testFiles: \n'
describeDirectory('./testFiles')
Chris,
os.path.getsize() needs the full path or relative path to the file, but
os.listdir() just returns the bare file name, so there is a slight
mismatch here. describeDirectory() works for the current dir because the
bare file name is the correct relative path. You should use
os.path.join(directory, files) to create the full path to pass to
os.path.getsize().
BTW 'files' is not such a great name because it is just one file, not
multiple. But don't change it to 'file', that is the name of a built-in
function! Maybe 'f' or 'name' or 'filename'.
Kent
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Re: [Tutor] Unexcepted Python Error : Exceptions.IOError: [Errorno 9] Bad File descriptor
Respected Sir , I am newand introducing myself as Vijaya Balaji Chellmani . When i was using the python for my office application ( uses VC++ ) unfortunately i was awarded with unexcepted python error .The error is Unexcepted Python Error : Exceptions.IOError: [Errorno 9] Bad File descriptor Situation for the occurance: i worte a script for querying certain objects .This script was invoked from vc++ through command prompt .Since the execution was slow , we switched over a modificationin the script .The modification was all the process of querying were taken under single class .and then we assigned a class id , other infomation for making this class as component.After all modification the script was runned to make a register process in the registry. Then the script was invoked from our application throughOLE instance.The querying showed a faster response . but the thing isi was stucked sometimes with error message cited above .But after ignoring the message and when i continue againwith some query process ( purpose of querying :finding a device name in pickle database ) i stucked up with the error again . Is there is any remedy for this . howcan i eliminate this .I will very usefulfor me if you clarify this doubt . I will be thankful to you. by Vijaya Balaji Chellamani. ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
[Tutor] Passing Dictionaries to Functions
If I have a dictionary:
mydict{'var1':a, 'var2':b}
and I want to pass it to a function as:
myfunc(var1=a, var2=b)
How would I do it?
Thanks
Ed
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Re: [Tutor] Unexcepted Python Error : Exceptions.IOError: [Errorno 9] Bad File descriptor
K.Vijaya Balaji Chellamani wrote: Respected Sir , I am new and introducing myself as Vijaya Balaji Chellmani . When i was using the python for my office application ( uses VC++ ) unfortunately i was awarded with unexcepted python error .The error is Unexcepted Python Error : Exceptions.IOError: [Errorno 9] Bad File descriptor You don't give us much to work with. Is there a stack trace associated with the error message? Can you show us the actual code that causes the error? Googling for the error message gives a hint that it may be caused by trying to write to stdout when the process does not have stdout defined. HTH Kent Situation for the occurance: i worte a script for querying certain objects .This script was invoked from vc++ through command prompt .Since the execution was slow , we switched over a modification in the script .The modification was all the process of querying were taken under single class .and then we assigned a class id , other infomation for making this class as component.After all modification the script was runned to make a register process in the registry. Then the script was invoked from our application through OLE instance.The querying showed a faster response . but the thing is i was stucked sometimes with error message cited above .But after ignoring the message and when i continue again with some query process ( purpose of querying :finding a device name in pickle database ) i stucked up with the error again . Is there is any remedy for this . how can i eliminate this . I will very useful for me if you clarify this doubt . I will be thankful to you. by Vijaya Balaji Chellamani. ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Passing Dictionaries to Functions
Ed Singleton wrote:
If I have a dictionary:
mydict{'var1':a, 'var2':b}
Presumably you mean
mydict = {'var1':a, 'var2':b}
and I want to pass it to a function as:
myfunc(var1=a, var2=b)
How would I do it?
myfunc(**mydict)
Kent
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Re: [Tutor] Passing Dictionaries to Functions
Thanks again.
This does bring up an issue I occaiosionally have with the documentation.
Presumambly myfunc(**mydict) is a fairly trivial thing, but it is very
hard to find when you don't know what you're looking for. Not sure
what the solution is, but the inability to search for things when you
don't know what they're called is a bit of a stumbling block
sometimes.
Maybe a page that very briefly summarises the 'unsearchable' with
links to fuller descriptions?
Ed
On 15/03/06, Kent Johnson [EMAIL PROTECTED] wrote:
Ed Singleton wrote:
If I have a dictionary:
mydict{'var1':a, 'var2':b}
Presumably you mean
mydict = {'var1':a, 'var2':b}
and I want to pass it to a function as:
myfunc(var1=a, var2=b)
How would I do it?
myfunc(**mydict)
Kent
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[Tutor] Converting String to Datetime
I seem to have a lot of questions today. Sorry. How can I convert a string in the format %Y-%m-%d %H:%M:%S into a datetime object? I can work out how to convert it to a time object by: import time timestring = 2005-09-01 12:30:09 time_format = %Y-%m-%d %H:%M:%S mytime = time.strptime(timestring,time_format) I can't seem to work out how to convert the time object into a datetime object... Any help appreciated. Thanks Ed ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Converting String to Datetime
Nevermind. i seem to have found the answer in that wonderful PLEAC site (I always forget about that. It appears that the following works: import time, datetime timestring = 2005-09-01 12:30:09 time_format = %Y-%m-%d %H:%M:%S datetime.datetime.fromtimestamp(time.mktime(time.strptime(mytime, time_format))) Ed On 15/03/06, Ed Singleton [EMAIL PROTECTED] wrote: I seem to have a lot of questions today. Sorry. How can I convert a string in the format %Y-%m-%d %H:%M:%S into a datetime object? I can work out how to convert it to a time object by: import time timestring = 2005-09-01 12:30:09 time_format = %Y-%m-%d %H:%M:%S mytime = time.strptime(timestring,time_format) I can't seem to work out how to convert the time object into a datetime object... Any help appreciated. Thanks Ed ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Passing Dictionaries to Functions
Ed Singleton wrote: Thanks again. This does bring up an issue I occaiosionally have with the documentation. Presumambly myfunc(**mydict) is a fairly trivial thing, but it is very hard to find when you don't know what you're looking for. Not sure what the solution is, but the inability to search for things when you don't know what they're called is a bit of a stumbling block sometimes. Yes. This syntax is actually hard to find in the docs when you *do* know what you are looking for. The best coverage I could find is in the Language Reference which isn't exactly light reading: http://docs.python.org/ref/calls.html It's also mentioned in the docs for apply(), which is an older way to do the same thing: http://www.python.org/doc/2.4.2/lib/non-essential-built-in-funcs.html Maybe a page that very briefly summarises the 'unsearchable' with links to fuller descriptions? Hmm. Sounds a little tricky to put together... Kent ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Converting String to Datetime
Ed Singleton wrote: I seem to have a lot of questions today. Sorry. How can I convert a string in the format %Y-%m-%d %H:%M:%S into a datetime object? I can work out how to convert it to a time object by: import time timestring = 2005-09-01 12:30:09 time_format = %Y-%m-%d %H:%M:%S mytime = time.strptime(timestring,time_format) I can't seem to work out how to convert the time object into a datetime object... Try datetime.datetime(*mytime[:6]) Gee, two questions in one day where the answer is, Use extended function call syntax ;) Kent ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
[Tutor] xemacs and python mode difficulty
Howdy,Relevant Data-Windows XP SP 2 or greaterPython 2.4.2 FinalXemacs 21.4.19--Problem:I really like xemacs as my editor of everything. However when I downloaded the installer for 21.4.19 to update my xemacs installation, python mode was gone. Searching for how to customize xemacs led me to a great deal of confusion.I would like to know the difference between ~/.emacs and .xemacs\custom.el and also how to install the python module, so that I can get syntax highlighting, the tab trick, C-c C-c, and the rest of the old python mode functionality.Thank you,FrancescoFrancesco Queirolo(+1)505.661.2670[EMAIL PROTECTED] Yahoo! Travel Find great deals to the top 10 hottest destinations!___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Tix: binding
On 15/03/06, [EMAIL PROTECTED] [EMAIL PROTECTED] wrote: I am looking at Tix and I am stuck with what seems to be a simple problem: I want to bind the cancel buttom of a ExFileSelectBox to a routine in my class, but can not make it work. I guess the problem is the same for any binding of tix sub-widgets, so if someone could send some sample code. import Tix root = Tix.Tk() box = Tix.ExFileSelectBox(root) print box.subwidget(name='cancel') .11827520.bf.cancel#so the sub-widget cancel buttom is there But how to bind it ? box.cancel(command = lambda a,b : a+b ) Traceback (most recent call last): File pyshell#12, line 1, in ? box.cancel(command = lambda a,b : a+b ) AttributeError: _dummyButton instance has no __call__ method Or box.subwidget(name='cancel' , command = lambda a,b : a+b ) Traceback (most recent call last): File pyshell#13, line 1, in ? box.subwidget(name='cancel' , command = lambda a,b : a+b ) TypeError: subwidget() got an unexpected keyword argument 'command' So, it seems I can not bind to command, but what then ? From the Tix docu I thought the buttoms are normal Tkinter widgets ? -- Harm Here's what I got from a little experimentation and print box.cancel.bind.__doc__. def bar(action): ... print action import Tix root = Tix.Tk() box = Tix.ExFileSelectBox(root) box.pack() box.cancel.bind(ButtonPress-1, bar) '-1212073588bar' Tkinter.Event instance at 0xb779c0ec Tkinter.Event instance at 0xb779c0ec Tkinter.Event instance at 0xb779c0ec If you have a look at box.cancel.bind.__doc__ you can find everything you can put into the SEQUENCE string ButtonPress-1 is left mouse click. ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Help with Game over program
On 3/15/06, Brad Hills [EMAIL PROTECTED] wrote: I'm 45 minutes into learning how to program using python. I am reading Python programming for the absolute begginer by Michael Dawson, and the first thing I've done was write the Game Over program. Which I understand is also called the Hello World Program. My main problem at this point is when I try to run the program from the icon on my desktop it asks me which program to associate it with. The book makes it sound like it will automatically execute the program. Am I doing something wrong? ___Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutorWhat operating system are you using? Windowz? Mac? Anna ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Tix: binding
On 16/03/06, Adam [EMAIL PROTECTED] wrote: On 15/03/06, [EMAIL PROTECTED] [EMAIL PROTECTED] wrote: I want to bind the cancel buttom of a ExFileSelectBox to a routine in my class, Here's what I got from a little experimentation and print box.cancel.bind.__doc__. def bar(action): ... print action import Tix root = Tix.Tk() box = Tix.ExFileSelectBox(root) box.pack() box.cancel.bind(ButtonPress-1, bar) '-1212073588bar' Tkinter.Event instance at 0xb779c0ec Tkinter.Event instance at 0xb779c0ec Tkinter.Event instance at 0xb779c0ec This will bind to leftmouse-down, which is different from clicking a button. If you want to simulate a real button click with event bindings, you will need to set a flag on ButtonPress-1, then in ButtonRelease-1 check for the flag, check to see if the mouse is within the button, and then activate your callback. Something else you could try (which I haven't tested) --- instead of box.cancel.bind, do box.cancel.config(command= ...). -- John. ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Dynamically naming functions
Very rarely, its easy to do backups of huge amounts of data if you know where to find it, its hard to trawl all over a changing structure looking for the things that need backing up. Particularly if, when you try to restore it, it needs to go in a different place to where you found it! Backing up is generally one of the lesser of my worries. Backing up is usually a no brainer, especially in a static structure, but even in a dynamic one you can just do a find on the file types. It's restoring a dynamic structure thats really hard, and usually a manual process... Maintaining content is primary. Oddly enough I usually expect content maintenance to be a 'business as usual' kind of thing. The content goes in one place per author and the code picks it up as needed. Unless you are dynamically generating static pages, they are a nightmare to maintain. If the content is dynamic in any way I always generate them dynamically - and that includes anything with company logo etc on it. About the only pure html pages I use are the Error reports - 404s etc... be quite repetitive. A large amount of the code on any page is the same as on any other page (page structure, boilerplate, etc). But most of that is template code just picking up content from a folder someplace (logo images, standard menus etc) and CSS style settings. I think it's a generally accepted principle that computers are better at handling thousands of files like that better than humans are. The Absolutely. Yes but a CMS normally uses a static structure with dynamic content. I think we might be using different meanings of structure. I'm referring to the site structure, as in which page is a parent of which other page. The site structure is just another aspect of the content. Ah, OK. I'm referring to the physical site structure, the folder heirarchy. A reference to the parent/child pages is just another attribute like content and title. Agreed, I'd expect those to be managed in the code and templates. A (good) CMS would create a dynamic structure for the user to browse, with folders and pages easily creatable and movable, I'm not sure I agree with that. It should allow movement of pages across folders with auto update iof relative paths etc, but not necessarily dynamic (ie at run time) changes. and references to pages would be dynamic so that if yo0u move a page internal links to it still work. I don;t necessarily see that as needing to be a dynamic feature, I'd probably prefer to do those kinds of changes under controlled circumstances and do the updates as a batch update process. Dynamic content is 'A Good Thing', dynamic structure is usually bad. But structure is just an aspect of content. If you mean navigation structure I agree, but physical structure - where the files live is absolutely not. And to make it so creates a huge headache for the site administrators - who usually cost a good deal more than the developers or content providers! Alan G. ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
[Tutor] Matching against various login prompts
Hi again,
I'm trying to improve on couple of python scripts that I wrote and
trying to get a successful/failed login re-usable module sorted out.
Is there any way to match a returned string against a predetermined list
of strings using the telnetlib module? I'm wanting to use a while loop
rather than an 'if ' so that I can get some error checking on the
username/password (ie typo in username).
uPrompt = ['Username: ']
pPrompt = ['Password: ']
gPrompt = ['']
sPrompt = ['login:']
prompt = tn.read_until('', 1)
while prompt == gPrompt:
do stuff for device here
While prompt == uPrompt:
do stuff for different device here
While prompt == sPrompt:
do stuff for different OS here
I've tried various combinations of tn.read_until's and tn.expect's but I
don't seem to be able to capture the last line returned and match
against conditions with it. I've read the telnetlib doco but can't
figure out which one of the many options is what I'm after (probably if
I define all the above as functions or something I could work it out but
haven't got that part straight in my head yet).
Cheers
Gideon
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Re: [Tutor] Help with Game over program
Python should have made the fileassociations when it wasinstalled, but you can justmanuallyassociate *.py files with C:\Python24\python.exe and then your program should run inside of a little DOS window. -Jack On 3/15/06, Brad Hills [EMAIL PROTECTED] wrote: I'm 45 minutes into learning how to program using python. I am reading "Python programming for the absolute begginer" by Michael Dawson, and the first thing I've done was write the "Game Over" program. Which I understand is also called the "Hello World" Program. My main problem at this point is when I try to run the program from the icon on my desktop it asks me which program to associate it with. The book makes it sound like it will automatically execute the program. Am I doing something wrong? ___Tutor maillist - Tutor@python.orghttp://mail.python.org/mailman/listinfo/tutor What operating system are you using? Windowz? Mac? Anna ___Tutor maillist - Tutor@python.orghttp://mail.python.org/mailman/listinfo/tutor ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
