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:mod:`modulefinder` --- Find modules used by a script
=====================================================
.. module:: modulefinder
:synopsis: Find modules used by a script.
.. sectionauthor:: A.M. Kuchling <amk@amk.ca>
**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*.
.. class:: ModuleFinder(path=None, debug=0, excludes=[], replace_paths=[])
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`.
.. _modulefinder-example:
Example usage of :class:`ModuleFinder`
--------------------------------------
The script that is going to get analyzed later on (bacon.py)::
import re, itertools
try:
import baconhameggs
except ImportError:
pass
try:
import guido.python.ham
except ImportError:
pass
The script that will output the report of bacon.py::
from modulefinder import ModuleFinder
finder = ModuleFinder()
finder.run_script('bacon.py')
print('Loaded modules:')
for name, mod in finder.modules.items():
print('%s: ' % name, end='')
print(','.join(list(mod.globalnames.keys())[:3]))
print('-'*50)
print('Modules not imported:')
print('\n'.join(finder.badmodules.keys()))
Sample output (may vary depending on the architecture)::
Loaded modules:
_types:
copyreg: _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: _PATTERNENDERS,SRE_FLAG_UNICODE
array:
types: __module__,IntType,TypeType
---------------------------------------------------
Modules not imported:
guido.python.ham
baconhameggs