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 3+.
    from xmlrpc import client, server
    server.SimpleXMLRPCDispatcher
except (ImportError, AttributeError):
    # Python 2.
    import xmlrpclib as client  # noqa: F401
    import SimpleXMLRPCServer as server