swf format verification?
hello, can someone recommend a good library to verify whether a file is in swf format (and ideally flv as well)? i need it to enable file uploading on to my web site. thanks konstantin -- http://mail.python.org/mailman/listinfo/python-list
how to add property "dynamically"?
hello,
i need to add properties to instances dynamically during run time.
this is because their names are determined by the database contents.
so far i found a way to add methods on demand:
class A(object) :
def __getattr__(self, name) :
if name == 'test' :
def f() : return 'test'
setattr(self, name, f)
return f
else :
raise AttributeError("'%s' object has no attribute '%s'" %
(self.__class__.__name__, name))
this seems to work and i can invoke method test() on an object. it
would be nice to have it as property though. so i tried:
class A(object) :
def __getattr__(self, name) :
if name == 'test' :
def f() : return 'test'
setattr(self, name, property(f))
return f
else :
raise AttributeError("'%s' object has no attribute '%s'" %
(self.__class__.__name__, name))
but this does not work, instance.test returns a callable but does not
call it.
i am not an expert in python, would someone please tell me what i am
doing wrong?
thanks
konstantin
--
http://mail.python.org/mailman/listinfo/python-list
Re: nested structure with "internal references"
On Sep 25, 1:11 pm, Torsten Mohr wrote: > Hi, > > sorry for posting in german before, that was a mistake. > > I'd like to use a nested structure in memory that consists > of dict()s and list()s, list entries can be dict()s, other list()s, > dict entries can be list()s or other dict()s. > > The lists and dicts can also contain int, float, string, ... > > But i'd also like to have something like a "reference" to another > entry. > I'd like to refer to another entry and not copy that entry, i need to > know later that this is a reference to another entry, i need to find > also access that entry then. > > Is something like this possible in Python? > > The references only need to refer to entries in this structure. > The lists may change at runtime (entries removed / added), so > storing the index may not help. > > Thanks for any hints, > Torsten. hello, maybe i know less python than you do, but i am talking from the point of view of my common sense and experience. if you store an object in a list more than once, i doubt that python creates a duplicate. unless the object is a value type. thus you have a reference to this object in both elements. and then if you are asking this question, maybe your design is not good enough? would you explain the problem? konstantin -- http://mail.python.org/mailman/listinfo/python-list
Re: nested structure with "internal references"
put a (name, value) pair in each list element instead of just value and reference them by name, you can use uuid to generate names konstantin -- http://mail.python.org/mailman/listinfo/python-list
module path?
hello, is there a way to determine the file location of a loaded module? assuming it is not built in. import settings print settings produces: i would like to get to this path somehow other than by parsing the string representation of the module. is there a property on types.ModuleType? i could not find anything... thanks konstantin -- http://mail.python.org/mailman/listinfo/python-list
Re: module path?
On Sep 28, 7:51 pm, Steven D'Aprano wrote: > On Mon, 28 Sep 2009 16:41:36 -0700, akonsu wrote: > > hello, > > > is there a way to determine the file location of a loaded module? > > assuming it is not built in. > > > import settings > > print settings > > > produces: > > > i would like to get to this path somehow other than by parsing the > > string representation of the module. is there a property on > > types.ModuleType? i could not find anything... > > Did you look at dir(settings) for a list of method and attribute names? > > Look at module.__file__. But be careful because some modules are "built > in", that is, they don't actually exist as a separate file and are part > of the Python compiler. E.g.: > > >>> import sys > >>> sys.__file__ > > Traceback (most recent call last): > File "", line 1, in > AttributeError: 'module' object has no attribute '__file__'>>> sys > > > > -- > Steven thanks! i did not know about dir() method. konstantin -- http://mail.python.org/mailman/listinfo/python-list
something like perl's Mail::GPG ?
hello, i am looking for a module with functionality similar to that of the Perl's Mail::GPG package. I need to verify multipart emails that are PGP-signed. thanks for any advice konstantin -- http://mail.python.org/mailman/listinfo/python-list
Re: coding for multiple versions of python
On Aug 13, 12:57 pm, "Tim Arnold" wrote: > Hi, > I've got a python based system that has to run on hp unix and red hat linux. > The Python version on the HP is 2.4 and the version on the Linux box is 2.6. > There's nothing I can do about that. > > I think that means I must have two different libraries since the pyc files > are not cross-version compatible. No problem for the libs like PIL or lxml. > But for the part of the system I actually code every day, I'd rather not do > dual maintenance, having two copies of my code for each platform/version. > > I'm guessing I need to configure cvs to copy files to both locations > whenever I commit. Does that sound right? Is there a better way I'm not > thinking of? > > thanks, > --Tim hello, why would you need to maintain pyc files at all? is having just source files enough? or am i missing something? konstantin -- http://mail.python.org/mailman/listinfo/python-list
cleanup in sys.excepthook?
hello, my script creates files that i need to delete if an exception is thrown. is this a good pythonic style to do this kind of cleanup in sys.excepthook instead of inside except clause of a try block? konstantin -- http://mail.python.org/mailman/listinfo/python-list
Re: Very simple finite automaton (?)
On Sep 23, 1:24 am, kpp9c wrote: > Very simple finite automaton (?) > > 1 --> 2 5 > 2 --> 1 4 > 3 --> 3 > 4 --> 1 > 5 --> 4 3 > hello, this is a graph and you are doing depth first search. konstantin -- http://mail.python.org/mailman/listinfo/python-list
Re: Very simple finite automaton (?)
On Sep 23, 11:49 am, akonsu wrote: > On Sep 23, 1:24 am, kpp9c wrote: > > > Very simple finite automaton (?) > > > 1 --> 2 5 > > 2 --> 1 4 > > 3 --> 3 > > 4 --> 1 > > 5 --> 4 3 > > hello, > this is a graph and you are doing depth first search. > konstantin BREADTH first. sorry :) -- http://mail.python.org/mailman/listinfo/python-list
Re: cleanup in sys.excepthook?
On Sep 23, 11:57 am, Jean-Michel Pichavant wrote: > akonsu wrote: > > hello, > > > my script creates files that i need to delete if an exception is > > thrown. > > > is this a good pythonic style to do this kind of cleanup in > > sys.excepthook instead of inside except clause of a try block? > > > konstantin > > def doIt(): > pass > > try: > doIt() > except Exception, exc: > #cleaning up files > > I mean, what is the problem with try except ? It's pythonic. If you tell > us what wrong with it in your case, we may spend time on hacking > sys.excepthook. > > Jean-Michel thanks. nothing is wrong with try/except. i just already have an excepthook handler that uses logger to send emails if a critical error occurs, so i was just thinking that maybe i can add cleanup there. i agree, try/except makes more sense. konstantin -- http://mail.python.org/mailman/listinfo/python-list
Re: Idiom for "last word in a string"
On Sep 23, 2:47 pm, Grant Edwards wrote: > I recently ran across this construct for grabbing the last > (whitespace delimited) word in a string: > > s.rsplit(None,1)[1] > > It was somewhat obvious from the context what it was supposed > to do, but it took a bit of Googling to figure out exactly what > was going on. > > When I want the last word in a string, I've always done this: > > s.split()[-1] > > I was wondering what the advantage of the rsplit(None,1)[1] > approach would be other than inducing people to learn about the > maxsplit argument that is accepted by the split() methods? > > -- > Grant Edwards grante Yow! I want a VEGETARIAN > at BURRITO to go ... with > visi.com EXTRA MSG!! hello, perhaps rsplit generates as many elements in the list as absolutely necesary compared to the whole list returned by split()? konstantin -- http://mail.python.org/mailman/listinfo/python-list
logging.handlers.SMTPHandler question
hello, SMTPHAndler seems to email every single record separately. is there a way to collect all log output and then send it in a single email message? or do i have to do it manually? thanks konstantin -- http://mail.python.org/mailman/listinfo/python-list
