offsets.py 文件源码

def __init__(self, n=1, normalize=False, **kwds):
        self.n = n
        self.normalize = normalize
        self.weekday = kwds.get('weekday', None)

        if self.weekday is not None:
            if self.weekday < 0 or self.weekday > 6:
                raise ValueError('Day must be 0<=day<=6, got %d' %
                                 self.weekday)

        self._inc = timedelta(weeks=1)
        self.kwds = kwds