samryl

def add_commas(number):
    """Add commas to a number every 3 places and return the result as a string.
        Handles positives/negatives, cases where 0 < abs(x) < 1, and numbers
        passed as a string."""

    # Ensure that the argument is a string
    number = str(number)

    isnegative = number[0] == "-"