Removed uneeded member variable usage

hpib.py

@@ -38,7 +38,6 @@ class PrologixGpibUsb(PortDevice):
             self._find_devices()
         else:
             self._devices = "Not scanned."
-        self._hpib_address = -1
 
     def _set_default_platform_values(self):
         if platform.system() == "Linux":
@@ -82,14 +81,14 @@ class PrologixGpibUsb(PortDevice):
 
     def _find_devices(self):
         self._devices = []
-        for self._hpib_address in range(0, 31):
-            commandStr = "++addr " + str(self._hpib_address) + chr(10) + \
+        for address in range(0, 31):
+            commandStr = "++addr " + str(address) + chr(10) + \
                          "*idn?" + chr(10) + \
                          "++read" + chr(10)
             self._serialPort.write(commandStr)
             returnStr = self._serialPort.readline()
             if returnStr != "":
-                self._devices += [self._hpib_address, returnStr]
+                self._devices += [address, returnStr]
 
     def command(self, hpib_address, command):
         if hpib_address != self._hpib_address:

test/test_hpib.py

@@ -99,7 +99,7 @@ class PrologixGpibUsbTest(unittest.TestCase):
             hpib.PrologixGpibUsb(port="device")
 
     def test_command_prepend_plusplus_addr_if_new_address(self):
-        address = 2
+        address = 0
         command = "command"
         write_mock = self.serial_mock.return_value.write
 
@@ -110,7 +110,7 @@ class PrologixGpibUsbTest(unittest.TestCase):
         write_mock.assert_called_with("++addr " + str(address) + chr(10) + command + chr(10))
 
     def test_command_no_prepend_plusplus_addr_if_address_already_used(self):
-        address = 2
+        address = 0
         command = "command"
         write_mock = self.serial_mock.return_value.write
 
@@ -122,7 +122,7 @@ class PrologixGpibUsbTest(unittest.TestCase):
         write_mock.assert_called_with(command + chr(10))
 
     def test_query_prepend_plusplus_addr_if_new_address(self):
-        address = 2
+        address = 0
         query = "query"
         write_mock = self.serial_mock.return_value.write
 
@@ -135,7 +135,7 @@ class PrologixGpibUsbTest(unittest.TestCase):
                                       "++read eoi" + chr(10))
 
     def test_query_no_prepend_plusplus_addr_if_address_already_used(self):
-        address = 2
+        address = 0
         query = "query"
         write_mock = self.serial_mock.return_value.write