How do I validate the format of a MAC address?

Question

What\'s the best way to validate that an MAC address entered by the user?

The format is HH:HH:HH:HH:HH:HH, where each H is a hexadecimal ch

Answer 1

This works like a charm.

def isMAC48Address(inputString):
    if inputString.count(":")!=5:
        return False
    for i in inputString.split(":"):
        for j in i:
            if j>"F" or (j<"A" and not j.isdigit()) or len(i)!=2:
                return False
    return True