Fix errors found by pychecker. I think these changes are correct, but I'm not sure.  Could someone who knows how this module works test it?  It can at least start on the cmd line.
Fix errors found by pychecker.
I think these changes are correct, but I'm not sure.  Could someone
who knows how this module works test it?  It can at least start on
the cmd line.

sk-/python2.7-type-annotator,sk-/python2.7-type-annotator,sk-/python2.7-type-annotator