Check a Password

Write a function that determines whether or not a password is good. A good password to be one that is at least 8 characters long and contains at least one upper case letter, at least one lowercase letter and at least one number.

	def checkPassword(password):
	# checker for upper, lower and number
	has_upper = False
	has_lower = False
	has_num = False
	# check for each character
	for ch in password:
	# check for upper
	if ch >= "A" and ch <= "Z":
	has_upper = True
	# if not upper then check for lower
	elif ch >= "a" and ch <= "z":
	has_lower = True
	# for number
	elif ch >= "0" and ch <= "9": # not using else here because puntauation can also be there
	has_num = True
	# end if
	# finally checking for length
	if len(password) >= 8 and has_upper and has_lower and has_num:
	return True
	return False
	p = input("Enter a password: ")
	if checkPassword(p):
	print("That's a good password.")
	else:
	print("That isn't a good password.")

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