1. class DataTest(object):
    2.     day = 0
    3.     month = 0
    4.     year = 0
    6.     def __init__(self, year=0, month=0, day=0):
    7.         self.day = day
    8.         self.month = month
    9.         self.year = year
    11.     def out_date(self):
    12.         print("year :", self.year)
    13.         print("month :", self.month)
    14.         print("day :", self.day)
    16.     @classmethod
    17.     def get_data(cls, string_date):
    18.         """处理'2018-8-18'字符格式"""
    19.         year, month, day = map(int, string_date.split('-'))
    20.         return cls(year, month, day)