def strptime(cls, string, format):
        """
        Constructs a :class:`mw.Timestamp` from an explicitly formatted string.
        See `<https://docs.python.org/3/library/time.html#time.strftime>`_ for a
        discussion of formats descriptors.

        :Parameters:
            string : str
                A formatted timestamp
            format : str
                The format description

        :Returns:
            :class:`mw.Timestamp`
        """
        return cls.from_time_struct(time.strptime(string, format))