Function convert_small_number

conversions/convert_number_to_words.py:95–134

Converts small, non-negative integers with irregular constructions in English (i.e., numbers under 100) into words. >>> convert_small_number(0) 'zero' >>> convert_small_number(5) 'five' >>> convert_small_number(10) 'ten' >>> convert_small_number(15) 'fifteen

(num: int)

def convert_small_number(num: int) -> str:
    """
    Converts small, non-negative integers with irregular constructions in English (i.e.,
    numbers under 100) into words.

    >>> convert_small_number(0)
    'zero'
    >>> convert_small_number(5)
    'five'
    >>> convert_small_number(10)
    'ten'
    >>> convert_small_number(15)
    'fifteen'
    >>> convert_small_number(20)
    'twenty'
    >>> convert_small_number(25)
    'twenty-five'
    >>> convert_small_number(-1)
    Traceback (most recent call last):
    ...
    ValueError: This function only accepts non-negative integers
    >>> convert_small_number(123)
    Traceback (most recent call last):
    ...
    ValueError: This function only converts numbers less than 100
    """
    if num < 0:
        raise ValueError("This function only accepts non-negative integers")
    if num >= 100:
        raise ValueError("This function only converts numbers less than 100")
    tens, ones = divmod(num, 10)
    if tens == 0:
        return NumberWords.ONES.value[ones] or "zero"
    if tens == 1:
        return NumberWords.TEENS.value[ones]
    return (
        NumberWords.TENS.value[tens]
        + ("-" if NumberWords.ONES.value[ones] else "")
        + NumberWords.ONES.value[ones]
    )


def convert_number(