Method invert

Lib/test/datetimetester.py:6432–6441

(ut, ti)

    @staticmethod
    def invert(ut, ti):
        lt = (array('q', ut), array('q', ut))
        if ut:
            offset = ti[0][0] // SEC
            lt[0][0] += offset
            lt[1][0] += offset
            for i in range(1, len(ut)):
                lt[0][i] += ti[i-1][0] // SEC
                lt[1][i] += ti[i][0] // SEC
        return lt

    @classmethod
    def fromfile(cls, fileobj):