Fix loading of machine settings. Minor cleanup

[cura.git] / Cura / avr_isp / stk500v2.py

diff --git a/Cura/avr_isp/stk500v2.py b/Cura/avr_isp/stk500v2.py
index 6cd551edf89d0d8de55d3f07a8d81e8ba75c7ea6..82fb12f4b9181887a4612a58ee4f67af9ca9718d 100644 (file)
--- a/Cura/avr_isp/stk500v2.py
+++ b/Cura/avr_isp/stk500v2.py
@@ -44,7 +44,7 @@ class Stk500v2(ispBase.IspBase):
        #Leave ISP does not reset the serial port, only resets the device, and returns the serial port after disconnecting it from the programming interface.
        #       This allows you to use the serial port without opening it again.
        def leaveISP(self):
-               if self.serial != None:
+               if self.serial is not None:
                        if self.sendMessage([0x11]) != [0x11, 0x00]:
                                raise ispBase.IspError("Failed to leave programming mode")
                        ret = self.serial
@@ -53,7 +53,7 @@ class Stk500v2(ispBase.IspBase):
                return None
        
        def isConnected(self):
-               return self.serial != None
+               return self.serial is not None
        
        def sendISP(self, data):
                recv = self.sendMessage([0x1D, 4, 4, 0, data[0], data[1], data[2], data[3]])