pywhich - tell me where a Python library came from

pywhich.py

#!/usr/bin/env python
"""
pywhich - tell me where a Python package came from

Original author:   Adam Anderson
Source:            https://stackoverflow.com/a/42365058
License:           CC-BY-SA-4.0
"""
from __future__ import print_function

GIST = 'https://gist.github.com/ernstki/a43d4c875c008e197027b4aff056ca6b'


def pywhich(module_name):
    module = __import__(module_name, globals(), locals(), [], 0)
    return module.__file__


if __name__ == "__main__":
    import sys
    import argparse

    parser = argparse.ArgumentParser(
            description="print where a Python package comes from",
            epilog="Source: {}".format(GIST))

    parser.add_argument('pkgs', metavar='PKG', nargs='+',
            help='package(s) to look for')

    opts = parser.parse_args()

    for pkg in opts.pkgs:
        try:
            print(pywhich(pkg))
        except ImportError:
            parser.error("No such module '{}'.".format(pkg))

Example:

$ pywhich tkinter
/opt/local/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/tkinter/__init__.py