question about introspection using inspect module
I'm trying to learn about introspection in Python. my ultimate goal
is to be able to build a module text database of all modules that
are in the sys.path, by discovering all candidate modules (I've
already done that), importing all of them, and then introspecting on
each module to discover its functions, globals and classes. But for
now I am having a problem with the latter.
I would like to import a module and figure out the names of its
defined functions, globals, and classes. Here's my attempt, file
foo.py, which has a single function, class, and global defined:
#!/usr/bin/env python
def somefunction(i):
i = i + 1
class someclass:
def __init__(self):
self.x = 0
self.y = 1
someglobal = 1.2
if __name__ == __main__: # when run as a script
import foo
import inspect
from inspect import *
isfuncs = filter(lambda x: re.match(^is, x) and x, dir(inspect))
print isfuncs
print filter(lambda x: re.match(some, x[0]) and x[0], getmembers(foo))
for f in isfuncs:
exec('print trying %20s: ,; print getmembers(foo, %s)' % (f, f))
the output of running it as a script is the following:
['isbuiltin', 'isclass', 'iscode', 'isdatadescriptor', 'isframe',
'isfunction', 'ismethod', 'ismethoddescriptor', 'ismodule', 'isroutine',
'istraceback']
[('someclass', class foo.someclass at 0x40058ddc), ('somefunction',
function somefunction at 0x40066a74), ('someglobal', 1.2)]
tryingisbuiltin: []
trying isclass: [('someclass', class foo.someclass at
0x40058ddc)]
trying iscode: []
trying isdatadescriptor: []
trying isframe: []
trying isfunction: [('somefunction', function somefunction at
0x40066a74)]
trying ismethod: []
trying ismethoddescriptor: []
trying ismodule: []
tryingisroutine: [('somefunction', function somefunction at
0x40066a74)]
trying istraceback: []
I was trying to use inspect.getmembers(foo, PRED) with an
appropriate predicate (is function). it looks like I am able to
discover that 'someclass' is a class, and that 'somefunction' is a
function (and also a routine, apparently). However, I cannot seem to
discover that 'someglobal' is a global. How to do so? Thanks,
--
Benjamin Rutt
--
http://mail.python.org/mailman/listinfo/python-list
Re: question about introspection using inspect module
Benjamin Rutt wrote: I'm trying to learn about introspection in Python. my ultimate goal is to be able to build a module text database of all modules that are in the sys.path, by discovering all candidate modules (I've already done that), importing all of them, and then introspecting on each module to discover its functions, globals and classes. But for now I am having a problem with the latter. I certainly don't want to discourage you from learning about python introspection, it's one of the most fun aspects of the language. But just as an FYI, the pydoc system already does much of what you have in mind, at least if I'm reading your description correctly: planck[/tmp] pydoc -p 12345 pydoc server ready at http://localhost:12345/ Just point your favorite webbrowser to that URL (use any port number you want, and which isn't already in use). Cheers, f -- http://mail.python.org/mailman/listinfo/python-list
Re: question about introspection using inspect module
Fernando Perez [EMAIL PROTECTED] writes: I certainly don't want to discourage you from learning about python introspection, it's one of the most fun aspects of the language. But just as an FYI, the pydoc system already does much of what you have in mind, at least if I'm reading your description correctly: planck[/tmp] pydoc -p 12345 pydoc server ready at http://localhost:12345/ thanks, I'm aware of that actually, and seeing all the information available there was inspiring to me. what I am actually trying to do is to build a database of Python modules. so then later, I can write a tool in my favorite editor (Emacs) to invoke some forms of completion against this database (e.g. os.removTAB or socket.TAB to see a list of all socket module definitions). I was browsing pydoc.py but at first glance was having trouble separating what in the code what is for the GUI, what is for the Web server, and what does the introspection. I have actually borrowed the ModuleScanner class already, to build the list of modules. It is just inspecting those modules further where I'm having trouble. thanks, -- Benjamin Rutt -- http://mail.python.org/mailman/listinfo/python-list
Re: question about introspection using inspect module
Benjamin Rutt wrote: Fernando Perez [EMAIL PROTECTED] writes: I certainly don't want to discourage you from learning about python introspection, it's one of the most fun aspects of the language. But just as an FYI, the pydoc system already does much of what you have in mind, at least if I'm reading your description correctly: planck[/tmp] pydoc -p 12345 pydoc server ready at http://localhost:12345/ thanks, I'm aware of that actually, and seeing all the information available there was inspiring to me. OK, you never know :) what I am actually trying to do is to build a database of Python modules. so then later, I can write a tool in my favorite editor (Emacs) to invoke some forms of completion against this database (e.g. os.removTAB or socket.TAB to see a list of all socket module definitions). well, I have no idea if this will be of any use, but it might: http://cedet.sourceforge.net/ I use their speedbar quite a bit, but it sounds from the description like they have some other fancier tools. I'd be quite curious to know if they play nicely with python (they mention C++ explicitly), and how much value they add. Let me know if you are familiar with them, or if you end up investigating these further. Cheers, f -- http://mail.python.org/mailman/listinfo/python-list
Re: question about introspection using inspect module
Benjamin Rutt [EMAIL PROTECTED] writes: what I am actually trying to do is to build a database of Python modules. so then later, I can write a tool in my favorite editor (Emacs) to invoke some forms of completion against this database (e.g. os.removTAB or socket.TAB to see a list of all socket module definitions). The problem with that is that Python is dynamic, so the list of completions may change over time. Not very likely, I know, but still... Have you considered writing this tool in Python, with Pymacs URL: http://pymacs.progiciels-bpi.ca/ ? That way, you could get the list at runtime with a dir(module). mike -- Mike Meyer [EMAIL PROTECTED] http://www.mired.org/home/mwm/ Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information. -- http://mail.python.org/mailman/listinfo/python-list
