is_binary_and_spaces_only

def isbin(num:str) ->bool:
    'check string contains only binary digits and spaces'
    nums = num.split()
    if not nums:  # treat empty as false
        return False
    for num in nums:
        if not set(num) <= {'0', '1'}:
            return False
    return True

tests = ['', '0', '1', '101 111', '0x101 111 10001', '00001 000001 11111111']
for test in tests:
    print(f'{test} gives {isbin(test)}')