gistfile1.py

def _month_bounds(date):
    """
    Helper: return the first and last days of the month for the given date.
    """
    first_day = date.replace(day=1)
    if first_day.month == 12:
        last_day = first_day.replace(year=first_day.year + 1, month=1)
    else:
        last_day = first_day.replace(month=first_day.month + 1)

    return first_day, last_day