renamed parameters

hpib.py

@@ -57,15 +57,15 @@ class PrologixGpibUsb(PortDevice):
         if not self._rematch:
             raise ValueError(port)
 
-    def _find_available_port(self, maxDeviceNum, port, portFormat, timeout, verbose):
-        while int(self._rematch.group(2)) < maxDeviceNum:
+    def _find_available_port(self, max_device_num, port, port_format, timeout, verbose):
+        while int(self._rematch.group(2)) < max_device_num:
             if verbose:
                 print "trying ", port
             try:
                 self._serialPort = serial.Serial(port, timeout=timeout)
                 break
             except serial.SerialException:
-                port = self._rematch.group(1) + (portFormat % (int(self._rematch.group(2)) + 1))
+                port = self._rematch.group(1) + (port_format % (int(self._rematch.group(2)) + 1))
                 self._rematch = re.search("(/dev/tty.*[^0-9])([0-9]+$)", port)
         if self._serialPort is None:
             raise serial.SerialException("Cannot find port")