fix pyflakes error and a bunch of PEP8 fixes
lots of little fixes here, the first commit fixes the minor error that pyflakes
raised, then the rest are all PEP8 fixes, as reported by the pep8
command line tool.
lots of little fixes here, the first commit fixes the minor error that pyflakes
raised, then the rest are all PEP8 fixes, as reported by the pep8
command line tool.