offsets.py 文件源码

def __init__(self, n=1, normalize=False, **kwds):
        self.n = n
        self.normalize = normalize
        self.weekday = kwds['weekday']
        self.week = kwds['week']

        if self.n == 0:
            raise ValueError('N cannot be 0')

        if self.weekday < 0 or self.weekday > 6:
            raise ValueError('Day must be 0<=day<=6, got %d' %
                             self.weekday)
        if self.week < 0 or self.week > 3:
            raise ValueError('Week must be 0<=day<=3, got %d' %
                             self.week)

        self.kwds = kwds