Ignore .idea
Remove empty directories
PEP8: Replace <> with !=
PEP8: Replace type(x) with isinstance
PEP8: Replace has_key with in
PEP8: Replace sort with sorted
PEP8: Remove trailing blank lines.
PEP8: Remove trailing whitespace on blank line.
PEP8: Remove trailing whitespace.
PEP8: Format block comments.
PEP8: Remove extraneous escape of newline.
PEP8: Remove extra blank lines.
PEP8: Add missing 2 blank lines.
PEP8: Add missing blank line.
PEP8: Fix extraneous whitespace around keywords.
PEP8: Fix extraneous whitespace around keywords.
PEP8: Add missing whitespace.
PEP8: Fix missing whitespace around operator.
PEP8: Fix extraneous whitespace around keywords.
PEP8: Remove extraneous whitespace.