Flake8 whitespace; add translate; change use 'is None' not = Changed out some strings like: _("foo bar bas....") into _( "foo" "bar bas") to handle long lines. Verified both forms result in the same string extraction using locale tools xgettext/xpot. Added a couple of translation marks.

try:
    # Python 2.
    my_input = raw_input
except NameError:
    # Python 3+.
    my_input = input