flake8 configuration and more fixes

Author: zsquareplusc

parallel/parallelppdev.py

@@ -363,15 +363,15 @@ def PPGETTIME(self):
         """
         ret = struct.pack('ll', 0, 0)
         ret = fcntl.ioctl(self._fd, PPGETTIME, ret)
-        return timevalToFloat(ret)
+        return self.timevalToFloat(ret)
 
     def PPSETTIME(self, time):
         """
         Sets the time-out (see PPGETTIME for more information).
         'time' is the new time-out in seconds; floating-point values
         are acceptable.
         """
-        fcntl.ioctl(self._fd, PPSETTIME, floatToTimeval(time))
+        fcntl.ioctl(self._fd, PPSETTIME, self.floatToTimeval(time))
 
     def PPGETMODES(self):
         """

tox.ini

@@ -0,0 +1,3 @@
+# tox is not used, but flake 8 reads this file
+[flake8]
+max-line-length = 120