Passing Variable to Function

[John McKenzie]

 Hello, all.

 I have a function that takes three arguments, arguments to express an RGB 
colour. The function controls an LED light strip (a Blinkytape).

 Sometimes I might need to be change what colour is sent to the function, 
so I set a variable with the idea that I can change just the variable 
later if I need to instead of changing a bunch of different lines.

So I have variables along the lines of this:

colour ="255, 0, 0"
colour2 ="100, 0, 0"


My function, written by the Blinkytape people:


def changeColor(r, g, b):
     serialPorts = glob.glob("/dev/ttyACM0*")
     port = serialPorts[0]

     if not port:
         sys.exit("Could not locate a BlinkyTape.")

     print "BlinkyTape found at: %s" % port

     bt = BlinkyTape.BlinkyTape(port)
     bt.displayColor(r, g, b)
     time.sleep(.1)  # Give the serial driver some time to actually send 
the data
     bt.close()


 Later, I have conditional statements like:


if latitude > maxNetural and latitude < NorthLine:
    changeColor(colour)
elif latitude > NorthLine:
    changeColor(colour2)



(There is a GPS device connected, there are variables defined based on 
latitude earlier in the script.)

 I get an error stating that changeColor takes three arguments and I am 
just giving it one (either "colour1" or "colour2").


 Is there a way to format the "colour" variable so that the changeColor 
function takes it as the three numbers it is meant to be defined as?


Entire script:
http://hastebin.com/qaqotusozo.py


 Thanks.