range equivalent for datetime

daterange.py

import datetime

def daterange(start_or_end, end=None, step=datetime.timedelta(1)):
    "daterange([start,] stop[, step]) -> list of dates"
    if end == None:
        end = start_or_end 
        start = datetime.date.today()
    current = start
    while current < end:
        yield current
        current = current + step