no more reload() in py3k
Hi all, this is possibly a python-dev question but I'll ask here first. Situation: I work on an application that takes 10-20 seconds to startup plus opening a document. To avoid having to restart the entire application each edit-debug cycle we rely heavily on the reload command. A typical method in our command dispatcher looks like this: def edit_something(self, something): reload(meshDialogModule) dlg = meshDialogModule.MeshDialog(self.app, something) dlg.run() when the application is built into an exe the reload function is redefined to lambda x: x. The advantage of this is that every time I open a dialog my latest changes are applied and the debug cycle is: edit code -> open dialog - > test -> close dialog -> edit code, which is many times faster than restarting the app and opening a project each time. Question: I am told to use the exec() statement instead. I don't see how I can use exec to reload a module. Cheers Tim -- http://mail.python.org/mailman/listinfo/python-list
Re: execfile and function call
I'm not sure why it doesn't work, but a better way would be to use the import statement: import app_applscrip app_applscript.createOptionList(applOptions) Cheers Tim -- http://mail.python.org/mailman/listinfo/python-list
Re: Missing documentation for ElementTree?
On Sep 26, 4:00 pm, "Gabriel Genellina" <[EMAIL PROTECTED]> wrote: > En Tue, 25 Sep 2007 19:39:33 -0300, Robert Dailey <[EMAIL PROTECTED]> > escribi?: > > > for the _ElementInterface class, there is no documentation for most of > > the > > members of this class such as .tail and .text. There's a brief > > description > > of these things on the front page of the ElementTree docs but nothing > > helpful. I have no idea what Tail is vs Text and I wanted to figure this > > out > > myself, however I don't think I can now. Anyone know if I'm just missing > > something in the documentation or if it really isn't in there? > > Start here:http://www.effbot.org/zone/element-index.htm > > -- > Gabriel Genellina Check out the development version of the documentation http://docs.python.org/dev/library/xml.etree.elementtree.html#module-xml.etree.ElementTree -- http://mail.python.org/mailman/listinfo/python-list
Re: Using closures and partial functions to eliminate redundant code
On Sep 27, 2:01 pm, Matthew Wilson <[EMAIL PROTECTED]> wrote:
> I wrote some code to create a user and update a user on a remote box by
> sending emails to that remote box. When I was done, I realized that my
> create_user function and my update_user function were effectively
> identical except for different docstrings and a single different value
> inside:
>
> ### VERSION ONE
>
> def create_user(username, userpassword, useremail):
> "Send an email that will create a user in the remote system."
>
> # Build email
> email_body = """
> USERNAME = %s
> USERPASSWORD = %s
> USEREMAIL = %s
> """ % (username, userpassword, useremail)
>
> # send it.
> send_email(subject="CREATE", body=email_body)
>
> def update_user(username, userpassword, useremail):
> "Send an email that will update a user's password in the remote
> system."
>
> # Build email
> email_body = """
> USERNAME = %s
> USERPASSWORD = %s
> USEREMAIL = %s
> """ % (username, userpassword, useremail)
>
> # send it.
> send_email(subject="UPDATE", body=email_body)
>
> ### END
>
> Then I came up with this approach to avoid all that redundant text:
>
> ### VERSION TWO
>
> def _f(mode):
>
> if mode not in ("create", "update"):
> raise ValueError("mode must be create or update!")
>
> def _g(username, userpassword, useremail):
>
> # Build email
> email_body = """
> USERNAME = %s
> USERPASSWORD = %s
> USEREMAIL = %s
> """ % (username, userpassword, useremail)
>
> # send it.
> send_email(subject=mode.upper(), body=email_body)
>
> # Seems goofy, but other ways are there?
>
> docstrings = {'create': "Send an email that will create a user in the
> remote system.",
> 'update': "Send an email that will update a user's
> password in the remote system."}
>
> _g.__doc__ = docstrings[mode]
>
> return _g
>
> # Then I created my functions like this:
>
> v2_create_user = _f("create")
> v2_update_user = _f("update")
>
> ### END
>
> Finally, I came up with this approach:
>
> ### VERSION THREE
>
> from functools import partial
>
> def _h(mode, username, userpassword, useremail):
>
> if mode not in ("create", "update"):
> raise ValueError("mode must be create or update!")
>
> # Build email
> email_body = """
> USERNAME = %s
> USERPASSWORD = %s
> USEREMAIL = %s
> """ % (username, userpassword, useremail)
>
> # send it.
> send_email(subject=mode.upper(), body=email_body)
>
> # I can't figure out how to set up the docstring on these.
>
> v3_create_user = partial(_h, mode="create")
> v3_update_user = partial(_h, mode="update")
>
> ### END
>
> I'm interested to hear how other people deal with really similar code.
> The similarity just bugs me. However, I wonder if using stuff like
> closures or partial function application is needlessly showy.
>
> Also, I hope anyone here can help me figure out how to attach a
> meaningful docstring for my version three code.
>
> Thanks in advance!
>
> Matt
Without using partials, I would do something like
def _create_or_update_user(mode, username, userpassword, useremail)
blah, blah, blah
def update_user(username, userpassword, useremail):
'update doc string'
return _create_or_update_user('update', username, userpassword,
useremail)
def create_user(username, userpassword, useremail):
'create doc string'
return _create_or_update_user('create', username, userpassword,
useremail)
Cheers
Tim
--
http://mail.python.org/mailman/listinfo/python-list
Re: developing an application
On Sep 28, 10:06 am, yadin <[EMAIL PROTECTED]> wrote: > hi! > i was buiding an application using python...a program > this was my first one...now that i got it working perfectly > how can i put the bunch of files into one package? > the user of the appliation will not know where to start? that is which > file to click on in oder to start the program? > thanks a lot Check out py2exe and distutils -- http://mail.python.org/mailman/listinfo/python-list
Re: GUI for viewing/editing python data structures?
On Sep 27, 11:23 am, "Joshua J. Kugler" <[EMAIL PROTECTED]> wrote: > A while back, I seem to remember coming across a small program that could > view and edit python data structures via a nice expanding tree view. I'm > now in need of something like that (to verify data is imported correctly > into a shelve file) and having a GUI would be much simpler than trying to > wade through the output of str(d) or repr(d). > > I've tried googling with the obvious keywords (gui (view OR edit) python > data structures) but t didn't get me anywhere. > > Pointers? > > j > > -- > Joshua Kugler > Lead System Admin -- Senior Programmerhttp://www.eeinternet.com > PGP Key:http://pgp.mit.edu/ ID 0xDB26D7CE Try any of the good Python IDE's and use breakpoints and the watch window. I like wing IDE from wingware.com - they have a free version now. -- http://mail.python.org/mailman/listinfo/python-list
Re: Convert on uppercase unaccentent unicode character
On Oct 4, 7:35 am, JBJ wrote: > Hi, > I'am very newbie in Python. > For the moment I'am trying to convert an unicode character to his uppercase > unaccented character. > By example with locale fr_FR: > a,A,à,À should return A > o,O,ô,Ô should return O > ½,¼ should return ¼ > i,I,î,Î should return I > > Have you some suggestions ? > > Thank. Unicode strings have an upper() method - try that. I'm think it should work properly with your locale - it doesn't give the expected result for me with an english locale. -- http://mail.python.org/mailman/listinfo/python-list
Re: Boolean parser..
On Oct 5, 7:29 am, Abandoned <[EMAIL PROTECTED]> wrote: > Hi.. > I try a boolean parser in python since 1 weak.. But i can't do this > because this is very complicated :( > Do you know any blooean parser script in python or how do i write a > boolean parser ? > example query: ((google or yahoo) or (live msn)) not web > I'm sorry my bad english. > King Regards.. Try the pyparsing module (google it) They have several examples. -- http://mail.python.org/mailman/listinfo/python-list
Re: Mixing Python and C classes in a module
On Oct 10, 3:32 pm, "Nicholas Bastin" <[EMAIL PROTECTED]> wrote: > On 10/9/07, Chris Mellon <[EMAIL PROTECTED]> wrote: > > > > > On 09 Oct 2007 16:56:30 +0200, Stefan Arentz <[EMAIL PROTECTED]> wrote: > > > > Is it possible to mix classes defined in both Python and C in the same > > > module? Ideally I would like to be able to do: > > > > from some.module import MyPythonClass, MyCClass > > > > I guess that would mean that this would look like this on disk: > > > > some/ > > >__init__.py > > >module.py (contains MyPythonClass) > > >module.so (contains MyCClass) > > > > But would this work? > > > No, you'll need to make module a package, and import from (differently > > named) implementation packages. > > Nah, you can do it, just not in this way. You can either futz with > ihooks, or name module.py something like _module.py, import it into C, > and then re-export as 'module', after attaching all your C types. > > -- > Nick It is easier to do it the other way around. Create module.py and _module.so and in module.py write: from _module.so import * -- http://mail.python.org/mailman/listinfo/python-list
decorating container types (Python 2.4)
Hi, I have a container class A and I want to add functionality to it by using a decorator class B, as follows: class A(object): def __len__(self): return 5 class B(object): def __init__(self, a): self._a = a def __getattr__(self, attr): return getattr(self._a, attr) def other_methods(self): blah blah blah I was expecting len(B) to return 5 but I get AttributeError: type object 'B' has no attribute '__len__' instead. I was expecting len() to call B.__len__() which would invoke B.__getattr__ to call A.__len__ but __getattr__ is not being called. I can work around this, but I am curious if anyone knows _why_ __getattr__ is not being called in this situation. Thanks Tim -- http://mail.python.org/mailman/listinfo/python-list
Re: decorating container types (Python 2.4)
On Oct 12, 12:19 pm, James Stroud <[EMAIL PROTECTED]> wrote: > [EMAIL PROTECTED] wrote: > > Hi, > > > I have a container class A and I want to add functionality to it by > > using a decorator class B, as follows: > > > class A(object): > > def __len__(self): > > return 5 > > > class B(object): > > def __init__(self, a): > > self._a = a > > > def __getattr__(self, attr): > > return getattr(self._a, attr) > > > def other_methods(self): > > blah blah blah > > > I was expecting len(B) to return 5 but I get > > AttributeError: type object 'B' has no attribute '__len__' > > instead. > > I was expecting len() to call B.__len__() which would invoke > > B.__getattr__ to call A.__len__ but __getattr__ is not being called. > > I can work around this, but I am curious if anyone knows _why_ > > __getattr__ is not being called in this situation. > > > Thanks > > Tim > > The why part is that __len__ is an unbound method of the class, not an > unbound method of the class's metaclass. Also, your code above makes > absolutely no association between classes A and B, which is the most > fundamental reason. > > James > > -- > James Stroud > UCLA-DOE Institute for Genomics and Proteomics > Box 951570 > Los Angeles, CA 90095 > > http://www.jamesstroud.com Just so I'm clear on this: Are you saying that the problem with my original code is that len() is equivalent to type(x).__len__(x) that looks for a class attribute rather than an instance attribute as my code requires? I don't own class A and they are generated by function calls rather than instantiated directly, that's why I'm decorating them instead of inheriting. The crux of the (academic) question is why does len() expect '__len__' to be a class attribute instead of an instance attribute, and why is this a good idea? Cheers Tim -- http://mail.python.org/mailman/listinfo/python-list
Re: remove header line when reading/writing files
On Oct 12, 12:23 pm, Tim Chase <[EMAIL PROTECTED]> wrote: > Forgot the enumerate call of all things > > > for zipfile in filelist: > >for i, line in enumerate(gzip.Gzipfile(zipfile,'r')): > >if i: outfile.write(line) > > Some days, I'm braindead. > > -tkc I would move the 'if' test outside the loop : for zipfile in filelist: zfiter = iter(gzip.Gzipfile(zipfile,'r')) zfiter.next() # ignore header line for i, line in enumerate(fziter): outfile.write(line) I'm not sure if the iter(...) is required. This will raise a StopIteration exception if zipfile is empty. Cheers Tim -- http://mail.python.org/mailman/listinfo/python-list
Re: Problem with format string / MySQL cursor
On Oct 19, 7:32 am, Florian Lindner <[EMAIL PROTECTED]> wrote:
> Hello,
> I have a string:
>
> INSERT INTO mailboxes (`name`, `login`, `home`, `maildir`, `uid`,
> `gid`, `password`) VALUES (%s, %s, %s, %s, %i, %i, %s)
>
> that is passed to a MySQL cursor from MySQLdb:
>
> ret = cursor.execute(sql, paras)
>
> paras is:
>
> ('flindner', '[EMAIL PROTECTED]', '/home/flindner/', '/home/
> flindner/Mail/test', 1001, 1001, '123')
>
> But that gives me an error:
>
> Traceback (most recent call last):
> File "account.py", line 188, in ?
> main()
> File "account.py", line 33, in main
> execute(action, account_type, options)
> File "account.py", line 129, in execute
> executeSQL(sql, options.username, options.login, options.home,
> options.directory, options.uid, options.gid, options.password)
> File "/home/flindner/common.py", line 29, in executeSQL
> ret = cursor.execute(sql, paras)
> File "/usr/lib/python2.4/site-packages/MySQLdb/cursors.py", line
> 148, in execute
> query = query % db.literal(args)
> TypeError: int argument required
>
> I don't see errors in the format string or some other problem
>
> What's wrong?
>
> Thanks,
>
> Florian
You should be using '?' for parameter bindings in your sql string not
python format specifiers (you are after all writing sql here not
python).
INSERT INTO mailboxes (`name`, `login`, `home`, `maildir`, `uid`,
`gid`, `password`) VALUES (?, ?, ?, ?, ?, ?, ?)
Cheers
Tim
--
http://mail.python.org/mailman/listinfo/python-list
Re: problem with Python class creating
On Oct 19, 8:22 am, dmitrey <[EMAIL PROTECTED]> wrote: > Hi all, > I have the code like this one: > > from myMisc import ooIter > class MyClass: > def __init__(self): pass > iterfcn = lambda *args: ooIter(self) # i.e pass the class instance > to other func named ooIter > field2 = val2 > field3 = val3 # etc > > So it yields "global name 'self' is not defined", that is true. How > could I handle the situation? > > Currently I do (and it works, but give me some troubles - I should > call MyClass.__init__ for each children class, and there are lots of > those ones) > > class MyClass: > def __init__(self): > iterfcn = lambda *args: ooIter(self) # i.e pass the class > instance to other func named ooIter > field2 = val2 > field3 = val3 # etc > > I suspect it has better solution, is it? > Thank you in advance, Dmitrey without having tested - I think this should work for you: from myMisc import ooIter class MyClass: def __init__(self): pass iterfcn = lambda self: ooIter(self) -- http://mail.python.org/mailman/listinfo/python-list
