python3 日期判别

判断一个日期是否为自定义日期格式,  以及该日期是否在期望的日期范围之内;

import time


class Date:
    EPS = float(1e-9)
    DATE_FORMAT = "%Y-%m-%d %H:%M:%S"  # 自定义日期格式;

    def __init__(self, start, end):
        if not self.is_valid_date(start) or not self.is_valid_date(end):
            raise RuntimeError('参数不合法')

        self.start = self.mk_time(start)
        self.end = self.mk_time(end)

    @classmethod
    def is_valid_date(cls, str_date):  # 判断是否为自定义日期格式;
        try:
            time.strptime(str_date, cls.DATE_FORMAT)
            return True
        except Exception:
            return False

    @classmethod
    def mk_time(cls, x):
        return time.mktime(time.strptime(x, cls.DATE_FORMAT))

    def is_target_date(self, str_date):  # 判断是否为期望日期范围;
        if not self.is_valid_date(str_date):
            return False

        cur = self.mk_time(str_date)
        return self.start-self.EPS <= cur < self.end-self.EPS


if __name__ == '__main__':
    ins = Date('2018-10-09 12:30:30', '2018-10-09 12:30:32')
    print(ins.is_target_date('2018-10-09 12:30:32'))