Clarify that one should not use __import__() directly. Also mention PEP 328 in explaining how 'index' works.
Clarify that one should not use __import__() directly. Also mention
PEP 328 in explaining how 'index' works.

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