Possibly fixing vim/python import machinery error

This is a possible fix for python-mode#972.

And it was based on pypa/setuptools#1563 (comment)

Author: diraol

pymode/__init__.py

@@ -4,7 +4,11 @@
 
 import sys
 import vim  # noqa
-
+try:
+    from importlib.machinery import PathFinder as _PathFinder
+    vim.find_module = _PathFinder.find_module
+except ImportError:
+    pass
 
 def auto():
     """Fix PEP8 erorrs in current buffer.