:mod:`modulefinder` --- Find modules used by a script

.. module:: modulefinder
   :synopsis: Find modules used by a script.

.. sectionauthor:: A.M. Kuchling <amk@amk.ca>

.. versionadded:: 2.3

Source code: :source:`Lib/modulefinder.py`

This module provides a :class:`ModuleFinder` class that can be used to determine the set of modules imported by a script. modulefinder.py can also be run as a script, giving the filename of a Python script as its argument, after which a report of the imported modules will be printed.

.. function:: AddPackagePath(pkg_name, path)

   Record that the package named *pkg_name* can be found in the specified *path*.

.. function:: ReplacePackage(oldname, newname)

   Allows specifying that the module named *oldname* is in fact the package named
   *newname*.  The most common usage would be  to handle how the :mod:`_xmlplus`
   package replaces the :mod:`xml` package.

This class provides :meth:`run_script` and :meth:`report` methods to determine the set of modules imported by a script. path can be a list of directories to search for modules; if not specified, sys.path is used. debug sets the debugging level; higher values make the class print debugging messages about what it's doing. excludes is a list of module names to exclude from the analysis. replace_paths is a list of (oldpath, newpath) tuples that will be replaced in module paths.

.. method:: report()

   Print a report to standard output that lists the modules imported by the
   script and their paths, as well as modules that are missing or seem to be
   missing.

.. method:: run_script(pathname)

   Analyze the contents of the *pathname* file, which must contain Python
   code.

.. attribute:: modules

   A dictionary mapping module names to modules. See
   :ref:`modulefinder-example`

import re, itertools

try:
    import baconhameggs
except ImportError:
    pass

try:
    import guido.python.ham
except ImportError:
    pass

from modulefinder import ModuleFinder

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

print 'Loaded modules:'
for name, mod in finder.modules.iteritems():
    print '%s: ' % name,
    print ','.join(mod.globalnames.keys()[:3])

print '-'*50
print 'Modules not imported:'
print '\n'.join(finder.badmodules.iterkeys())

Loaded modules:
_types:
copy_reg:  _inverted_registry,_slotnames,__all__
sre_compile:  isstring,_sre,_optimize_unicode
_sre:
sre_constants:  REPEAT_ONE,makedict,AT_END_LINE
sys:
re:  __module__,finditer,_expand
itertools:
__main__:  re,itertools,baconhameggs
sre_parse:  __getslice__,_PATTERNENDERS,SRE_FLAG_UNICODE
array:
types:  __module__,IntType,TypeType
---------------------------------------------------
Modules not imported:
guido.python.ham
baconhameggs