python question

Specification: The second function you will write should be called 'cardType'. Your function should take one (1) argument, an integer representing a card type The function should return one (1) string. The return string should contain one of three possible values: Visa', MasterCard', 'Discover Card'. The value should be determined according to the following rules Credit card numbers follow a standard system. For example, Visa, MasterCard, and Discover Card all have 16 digits, and the first digit serves to indicate the card brand. All Visa cards start with a 4 MasterCard cards always starts with a 5; and Discover cards start with a 6 For this lab, you may assume your function will only be passed a 4, 5, or 6 Testing: Create your own test cases