ops.py 文件源码

def _is_offset(self, arr_or_obj):
        """ check if obj or all elements of list-like is DateOffset """
        if isinstance(arr_or_obj, pd.DateOffset):
            return True
        elif is_list_like(arr_or_obj):
            return all(isinstance(x, pd.DateOffset) for x in arr_or_obj)
        else:
            return False