Brandon Collatz Sequence

# Write your code here :-)
import sys

print('Enter number:')

try:
    number = int(input())
    while True:
        def collatz():
            global number
            if number == 1:
                sys.exit

            elif number % 2 == 0:
                print(number // 2)
                number = number // 2

            elif number % 2 == 1:
                print(3 * number + 1)
                number = 3 * number + 1

        collatz()

except ValueError:
    print('Are you dumb? Kindly enter and integer/number mortal')