collatzFunc.py

def collatz(number):
##	global number
		if number % 2 == 0:
			number = number // 2
			print(number)
			return number

		else:
			number = number * 3 + 1
			print(number)
			return number

def inputNumber():
	print('Please enter a number for the Collatz sequence:')
	try:
		number = int(input())
		while number != 1:
	
			number = collatz(number)
	except ValueError:
		print('You must input an integer value')
	
inputNumber()