def Parse(self, argument):
    try:
      self.value = self.parser.Parse(argument)
    except ValueError, e:  # recast ValueError as IllegalFlagValue
      raise IllegalFlagValue((self.name, argument, e) % "flag --%s=%s: %s")
    self.present += 1
dataset/ETHPy150Open AppScale/appscale/AppServer/lib/python-gflags/gflags.py/Flag.Parse/swapped operands of `%`