timestamp.py 文件源码

def __init__(self, time, inc):
        """Create a new :class:`Timestamp`.

        This class is only for use with the MongoDB opLog. If you need
        to store a regular timestamp, please use a
        :class:`~datetime.datetime`.

        Raises :class:`TypeError` if `time` is not an instance of
        :class: `int` or :class:`~datetime.datetime`, or `inc` is not
        an instance of :class:`int`. Raises :class:`ValueError` if
        `time` or `inc` is not in [0, 2**32).

        :Parameters:
          - `time`: time in seconds since epoch UTC, or a naive UTC
            :class:`~datetime.datetime`, or an aware
            :class:`~datetime.datetime`
          - `inc`: the incrementing counter
        """
        if isinstance(time, datetime.datetime):
            if time.utcoffset() is not None:
                time = time - time.utcoffset()
            time = int(calendar.timegm(time.timetuple()))
        if not isinstance(time, integer_types):
            raise TypeError("time must be an instance of int")
        if not isinstance(inc, integer_types):
            raise TypeError("inc must be an instance of int")
        if not 0 <= time < UPPERBOUND:
            raise ValueError("time must be contained in [0, 2**32)")
        if not 0 <= inc < UPPERBOUND:
            raise ValueError("inc must be contained in [0, 2**32)")

        self.__time = time
        self.__inc = inc