Applied several PEP8 Styleguidelines.

[jmoeckel]

In detail:
# 'E101', # - Reindent all lines.
# 'E11 ', # - Fix indentation. (not include E112 and E113)
# 'E121', # - Fix indentation to be a multiple of four.
# 'E122', # - Add absent indentation for hanging indentation.
# 'E123', # - Align closing bracket to match opening bracket.
# 'E124', # - Align closing bracket to match visual indentation.
# 'E125', # - Indent to distinguish line from next logical line.
# 'E126', # - Fix over-indented hanging indentation.
# 'E127', # - Fix visual indentation.
# 'E128', # - Fix visual indentation.
# 'E20 ', # - Remove extraneous whitespace.
# 'E211', # - Remove extraneous whitespace.
# 'E22 ', # - Fix extraneous whitespace around keywords.
# 'E224', # - Remove extraneous whitespace around operator.
# 'E226', # - Fix missing whitespace around arithmetic operator.
# 'E227', # - Fix missing whitespace around bitwise/shift operator.
# 'E228', # - Fix missing whitespace around modulo operator.
# 'E231', # - Add missing whitespace.
# 'E241', # - Fix extraneous whitespace around keywords.
# 'E242', # - Remove extraneous whitespace around operator.
# 'E251', # - Remove whitespace around parameter '=' sign.
# 'E26 ', # - Fix spacing after comment hash for inline comments.
# 'E265', # - Fix spacing after comment hash for block comments.
# 'E27 ', # - Fix extraneous whitespace around keywords.
# 'E301', # - Add missing blank line.
# 'E302', # - Add missing 2 blank lines.
# 'E303', # - Remove extra blank lines.
# 'E304', # - Remove blank line following function decorator.
# 'E306', # - Expected 1 blank line before a nested definition
# 'E401', # - Put imports on separate lines.
# 'E502', # - Remove extraneous escape of newline.
# 'E70 ', # - Put semicolon-separated compound statement on separate lines.
# 'W291', # - Remove trailing whitespace.
# 'W292', # - Add a single newline at the end of the file.
# 'W293', # - Remove trailing whitespace on blank line.
# 'W391', # - Remove trailing blank lines.

[jmoeckel]

This is to increase readability and portability.