def ctime():
    """Return a string representing the date and time.

        datetime(2002, 12, 4, 20, 30, 40).ctime() == 'Wed Dec 4 20:30:40 2002'.
        d.ctime() is equivalent to time.ctime(time.mktime(d.timetuple())) on
        platforms where the native C ctime() function (which time.ctime()
        invokes, but which datetime.ctime() does not invoke) conforms to the
        C standard.
        """
