global variable not assigned, newbie question

[Diez B. Roggisch]

You need myNum to be declared global:
 
def setNum():
    global myNum
    myNum = 10
    print myNum

Apart from that, its usually considered bad style using global variables -
better use this:

def calcNum():
    myNum = 10
    return myNum

myNum = calcNum()


-- 
Regards,

Diez B. Roggisch