Python find loaded modules

Finding modules used by a Python script (modulefinder)

The ModuleFinder class in ‘modulefinder’ module can determine set of modules imported by a certain script. This module has a command line interface as well as programmatic interface.

For demonstration of functionality, use following script

#modfinder.py import hello try: import trianglebrowser import nomodule,mymodule except ImportError: pass

Command line interface

Following command displays list of modules located as well as not found.

E:\python37>python -m modulefinder modfinder.py

Output

Name File ---- ---- m __main__ modfinder.py m hello hello.py m math m trianglebrowser trianglebrowser.py Missing modules: ? mymodule imported from __main__ ? nomodule imported from __main__

Programmatic interface

ModuleFinder class in this module provides run_script() and report() methods to determine the set of modules imported by a script.

This method prints 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.

This method analyzes the contents of the given file, which must contain Python code.

This is a dictionary mapping module names to modules.

This is a list of modules that could not be loaded.

Example

import modulefinder modfind=modulefinder.ModuleFinder() modfind.run_script('modfinder.py') print ('Modules loaded:') for k,v in modfind.modules.items(): print (k,v) print ('not found:') for i in modfind.badmodules.keys(): print (i)

Output

Modules loaded: __main__ Module('__main__', 'modfinder.py') hello Module('hello', 'E:/python37\hello.py') trianglebrowser Module('trianglebrowser', 'E:/python37\trianglebrowser.py') math Module('math') not found: nomodule mymodule

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modulefinder — Find modules used by a script¶

This module provides a 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.

modulefinder. AddPackagePath ( pkg_name , path ) ¶

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

modulefinder. ReplacePackage ( oldname , newname ) ¶

Allows specifying that the module named oldname is in fact the package named newname.

class modulefinder. ModuleFinder ( path = None , debug = 0 , excludes = [] , replace_paths = [] ) ¶

This class provides run_script() and 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.

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.

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

A dictionary mapping module names to modules. See Example usage of ModuleFinder .

Example usage of 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__ re._compiler: isstring,_sre,_optimize_unicode _sre: re._constants: REPEAT_ONE,makedict,AT_END_LINE sys: re: __module__,finditer,_expand itertools: __main__: re,itertools,baconhameggs re._parser: _PATTERNENDERS,SRE_FLAG_UNICODE array: types: __module__,IntType,TypeType --------------------------------------------------- Modules not imported: guido.python.ham baconhameggs 

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