Le Samedi 24 Juin 2006 04:41, Jorge Vargas a écrit :
> On 6/23/06, Jorge Vargas <[EMAIL PROTECTED]> wrote:
> > Hi everyone I have wasted 2 hours trying to figure out how to get a
> > reference to the module object. that is the one returned by
> >
> > __import__ or when you call a module for name like
> >
> > >>> import sys
> > >>> sys
> >
> > <module 'sys' (built-in)>
In [16]: from types import ModuleType
In [17]: print ModuleType.__doc__
module(name[, doc])
Create a module object.
The name must be a string; the optional doc argument can have any type.
In [18]: ModuleType is type(sys)
Out[18]: True
> >
> > the reason I want this is that I want to introspec my module
> >
> > so I need some way to indentify what elements are inside the module, to
> > execute something like:
> >
> > ""for all the classes defined in this module do <something>"
>
Like for any other object, use the __dict__ attribute :
In [19]: sys.__dict__.items()[:3]
Out[19]:
[('setrecursionlimit', <built-in function setrecursionlimit>),
('getfilesystemencoding', <built-in function getfilesystemencoding>),
('stdout', <open file '<stdout>', mode 'w' at 0xa7ddc068>)]
Also, you''ll need these :
In [59]: from types import ClassType
In [60]: import subprocess
In [61]: subprocess.__dict__['Popen']
Out[61]: <class 'subprocess.Popen'>
In [62]: isinstance(subprocess.__dict__['Popen'], type)
Out[62]: True
In [63]: isinstance(subprocess.__dict__['Popen'], ClassType)
Out[63]: False
In [64]: ClassType # old-style class
Out[64]: <type 'classobj'>
putting all togetther :
In [75]: def find_classes(mod) :
....: for k, v in mod.__dict__.iteritems() :
....: if isinstance(v, type) : print 'new style class : ', k
....: elif isinstance(v, ClassType) : print 'old style class : ', k
....:
....:
In [76]: find_classes(subprocess)
new style class : Popen
In [77]: find_classes(sys)
In [78]: find_classes(os)
old style class : _Environ
new style class : stat_result
old style class : error
new style class : statvfs_result
> I found an ugly hack to the docs help(type(sys))
This is not ugly, people used to do "type('')" rather than "import types;
types.StringType", in prior versions of python (2.1).
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