On MSys2 I was trying to build the HTML version of the Sphinx-based documentation with make html
and got the following error:
loading intersphinx inventory from http://docs.python.org/objects.inv...
WARNING: intersphinx inventory 'http://docs.python.org/objects.inv' not fetchable due to <class 'urllib2.URLError'>: <urlopen error [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:581)>