Return a list of important Python modules in a script?

Posted by Jono Bacon on Stack Overflow See other posts from Stack Overflow or by Jono Bacon
Published on 2010-04-03T20:33:45Z Indexed on 2010/04/03 20:43 UTC
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Hi All,

I am writing a program that categorizes a list of Python files by which modules they import. As such I need to scan the collection of .py files ad return a list of which modules they import. As an example, if one of the files I import has the following lines:

import os
import sys, gtk

I would like it to return:

["os", "sys", "gtk"]

I played with modulefinder and wrote:

from modulefinder import ModuleFinder

finder = ModuleFinder()
finder.run_script('testscript.py')

print 'Loaded modules:'
for name, mod in finder.modules.iteritems():
    print '%s ' % name,

but this returns more than just the modules used in the script. As an example in a script which merely has:

import os
print os.getenv('USERNAME')

The modules returned from the ModuleFinder script return:

tokenize  heapq  __future__  copy_reg  sre_compile  _collections  cStringIO  _sre  functools  random  cPickle  __builtin__  subprocess  cmd  gc  __main__  operator  array  select  _heapq  _threading_local  abc  _bisect  posixpath  _random  os2emxpath  tempfile  errno  pprint  binascii  token  sre_constants  re  _abcoll  collections  ntpath  threading  opcode  _struct  _warnings  math  shlex  fcntl  genericpath  stat  string  warnings  UserDict  inspect  repr  struct  sys  pwd  imp  getopt  readline  copy  bdb  types  strop  _functools  keyword  thread  StringIO  bisect  pickle  signal  traceback  difflib  marshal  linecache  itertools  dummy_thread  posix  doctest  unittest  time  sre_parse  os  pdb  dis

...whereas I just want it to return 'os', as that was the module used in the script.

Can anyone help me achieve this?

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