How old am I?

gistfile1.py

import math
from datetime import datetime

def how_old_am_i(year, month, day):
    """
    Get how old you are in years.
    :param year: Integer year born
    :param month: Integer month born
    :param day: Integer day born
    :retuns: Integer years old
    """
    birthday = datetime(year, month, day)
    delta = datetime.now() - birthday

    return int(math.floor(delta.days / 365))