$ python -We pwb.py
Traceback (most recent call last):
  File "pwb.py", line 187, in <module>
    import pywikibot
  File "...\pywikibot-core\pywikibot\__init__.py", line 65, in <module>
    from pywikibot.family import Family
  File "...\pywikibot-core\pywikibot\family.py", line 14, in <module>
    import imp
  File "...\Python\Python36\lib\imp.py", line 33, in <module>
    DeprecationWarning, stacklevel=2)
DeprecationWarning: the imp module is deprecated in favour of importlib; see the module's documentation for alternative uses
<class 'DeprecationWarning'>
CRITICAL: Closing network session.