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.

report()

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.

run_script()

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

modules

This is a dictionary mapping module names to modules.

badmodules

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