CheckIO - Count digits

Problem: py.checkio.org/en/mission/count-digits/

My Solution:

def count_digits(text: str) -> int:
    # your code here
    count = 0
    for n in list(text):
        if n.isdigit():
            count = count + 1
    return count


if __name__ == '__main__':
    print("Example:")
    print(count_digits('hi'))

    # These "asserts" are used for self-checking and not for an auto-testing
    assert count_digits('hi') == 0
    assert count_digits('who is 1st here') == 1
    assert count_digits('my numbers is 2') == 1
    assert count_digits('This picture is an oil on canvas '
 'painting by Danish artist Anna '
 'Petersen between 1845 and 1910 year') == 8
    assert count_digits('5 plus 6 is') == 2
    assert count_digits('') == 0
    print("Coding complete? Click 'Check' to earn cool rewards!")

 

A good solution that I see

def count_digits(text: str) -> int:
    return sum(c.isdigit() for c in text)