Issues fixed:
1 E111 indentation is not a multiple of four
1 E201 whitespace after '['
14 E251 no spaces around keyword / parameter equals
7 E301 expected 1 blank line, found 0
55 E302 expected 2 blank lines, found 1
69 E501 line too long (80 characters)
3 W291 trailing whitespace
4 W601 .has_key() is deprecated, use 'in'
Classes that inherit __hash__ and comparison functions like __eq__ (e.g.
from object) but only override one of them will break under Python 3.
This is because a class shouldn't use one criterion for equality and a
different one for hashing. Explicitly discarding the inherited __hash__
method disables this warning and makes the class unhashable (not a
problem in this case).
