Pyflakes monkey-patch to give appropriately formatted syntax error for vim

Pyflakes monkeypatch

#!/usr/bin/env python                                                           

import sys
import pyflakes.reporter as reporter
from pyflakes.scripts.pyflakes import main


# Monkey patch syntax error method for suitability with vim
def vimhappy_syntaxError(self, filename, msg, lineno, offset, text):
    line = text.splitlines()[-1]
    if offset is not None:
        offset = offset - (len(text) - len(line))
    self._stderr.write(reporter.u('%s:%d:%d: %s\n') % (filename, lineno,
                       offset+1, msg))


reporter.Reporter.syntaxError = vimhappy_syntaxError


main(sys.argv[1:])