:mod:`modulefinder` --- Find modules used by a script
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=====================================================
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.. module:: modulefinder
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:synopsis: Find modules used by a script.
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.. sectionauthor:: A.M. Kuchling <amk@amk.ca>
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**Source code:** :source:`Lib/modulefinder.py`
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--------------
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This module provides a :class:`ModuleFinder` class that can be used to determine
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the set of modules imported by a script. ``modulefinder.py`` can also be run as
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a script, giving the filename of a Python script as its argument, after which a
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report of the imported modules will be printed.
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.. function:: AddPackagePath(pkg_name, path)
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Record that the package named *pkg_name* can be found in the specified *path*.
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.. function:: ReplacePackage(oldname, newname)
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Allows specifying that the module named *oldname* is in fact the package named
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*newname*.
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.. class:: ModuleFinder(path=None, debug=0, excludes=[], replace_paths=[])
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This class provides :meth:`run_script` and :meth:`report` methods to determine
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the set of modules imported by a script. *path* can be a list of directories to
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search for modules; if not specified, ``sys.path`` is used. *debug* sets the
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debugging level; higher values make the class print debugging messages about
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what it's doing. *excludes* is a list of module names to exclude from the
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analysis. *replace_paths* is a list of ``(oldpath, newpath)`` tuples that will
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be replaced in module paths.
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.. method:: report()
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Print a report to standard output that lists the modules imported by the
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script and their paths, as well as modules that are missing or seem to be
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missing.
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.. method:: run_script(pathname)
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Analyze the contents of the *pathname* file, which must contain Python
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code.
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.. attribute:: modules
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A dictionary mapping module names to modules. See
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:ref:`modulefinder-example`.
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.. _modulefinder-example:
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Example usage of :class:`ModuleFinder`
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--------------------------------------
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The script that is going to get analyzed later on (bacon.py)::
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import re, itertools
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try:
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import baconhameggs
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except ImportError:
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pass
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try:
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import guido.python.ham
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except ImportError:
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pass
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The script that will output the report of bacon.py::
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from modulefinder import ModuleFinder
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finder = ModuleFinder()
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finder.run_script('bacon.py')
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print('Loaded modules:')
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for name, mod in finder.modules.items():
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print('%s: ' % name, end='')
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print(','.join(list(mod.globalnames.keys())[:3]))
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print('-'*50)
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print('Modules not imported:')
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print('\n'.join(finder.badmodules.keys()))
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Sample output (may vary depending on the architecture)::
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Loaded modules:
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_types:
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copyreg: _inverted_registry,_slotnames,__all__
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sre_compile: isstring,_sre,_optimize_unicode
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_sre:
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sre_constants: REPEAT_ONE,makedict,AT_END_LINE
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sys:
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re: __module__,finditer,_expand
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itertools:
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__main__: re,itertools,baconhameggs
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sre_parse: _PATTERNENDERS,SRE_FLAG_UNICODE
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array:
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types: __module__,IntType,TypeType
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---------------------------------------------------
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Modules not imported:
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guido.python.ham
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baconhameggs
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