idatetime.py 文件源码

def fromtimestamp(timestamp, tz=None):
        """Return the local date and time corresponding to the POSIX timestamp.

        Same as is returned by time.time(). If optional argument tz is None or
        not specified, the timestamp is converted to the platform's local date
        and time, and the returned datetime object is naive.

        Else tz must be an instance of a class tzinfo subclass, and the
        timestamp is converted to tz's time zone. In this case the result is
        equivalent to
        tz.fromutc(datetime.utcfromtimestamp(timestamp).replace(tzinfo=tz)).

        fromtimestamp() may raise ValueError, if the timestamp is out of the
        range of values supported by the platform C localtime() or gmtime()
        functions. It's common for this to be restricted to years in 1970
        through 2038. Note that on non-POSIX systems that include leap seconds
        in their notion of a timestamp, leap seconds are ignored by
        fromtimestamp(), and then it's possible to have two timestamps
        differing by a second that yield identical datetime objects.

        See also utcfromtimestamp().
        """