Following is from pylint docs:
--ignore= Add to the black list. It should be a base name, not a path. You may set t
You can not give a path but only the "basename" of the directory. E.g. use --ignore=lib instead of --ignore-=appengine-toolkit/gaetk/lib.
--ignore=lib
--ignore-=appengine-toolkit/gaetk/lib
Problem is you will ignore all directories named lib.
lib