<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def parsehttpdate(string_):
 """ Parses an HTTP date into a datetime object. datetime.datetime(1970, 1, 1, 1, 1, 1) """

    try:
        t = time.strptime(string_, "%a, %d %b %Y %H:%M:%S %Z")
    except ValueError:
        return None
    return datetime.datetime(*t[:6])