时间

class DatetimeConverter:
DATETIME_FORMATTER = "%Y-%m-%d %H:%M:%S"
DATETIME_FORMATTER2 = "%Y-%m-%d"

@classmethod
def bulid_conveter_with_other_formatter(cls, datetime_str, datetime_formatter):
"""
:param datetime_str: 时间字符串
:param datetime_formatter: 能够格式化该字符串的模板
:return:
"""
datetime_obj = datetime.datetime.strptime(datetime_str, datetime_formatter)
return cls(datetime_obj)

def __init__(self, datetimex: typing.Union[int, float, datetime.datetime, str] = time.time()):
"""
:param datetimex: 接受时间戳 datatime类型 和 时间字符串三种类型
"""
if isinstance(datetimex, str):
if not re.match('\d{4}-\d{2}-\d{2} \d{2}:\d{2}:\d{2}', datetimex):
raise ValueError('时间字符串的格式不符合此传参的规定')
else:
self.datetime_obj = datetime.datetime.strptime(datetimex, self.DATETIME_FORMATTER)
elif isinstance(datetimex, (int, float)):
self.datetime_obj = datetime.datetime.utcfromtimestamp(datetimex)
elif isinstance(datetimex, datetime.datetime):
self.datetime_obj = datetimex
else:
raise ValueError('实例化时候的传参不符合规定')

@property
def datetime_str(self):
return self.datetime_obj.strftime(self.DATETIME_FORMATTER)

@property
def timestamp(self):
return self.datetime_obj.timestamp()

@property
def date_str(self):
return self.datetime_obj.strftime(self.DATETIME_FORMATTER2)

@property
def one_hour_ago_datetime_converter(self):
"""
酒店经常需要提前一小时免费取消，直接封装在这里
:return:
"""
one_hour_ago_datetime_obj = self.datetime_obj + datetime.timedelta(hours=-1)
return self.__class__(one_hour_ago_datetime_obj)

def is_greater_than_now(self):
return self.timestamp > time.time()

def __str__(self):
return self.datetime_str

def __call__(self):
return self.datetime_obj


if __name__ == '__main__':
"""
1557113661.0
'2019-05-06 12:34:21'
'2019/05/06 12:34:21'
DatetimeConverter(1557113661.0)()
"""
o3 = DatetimeConverter('2019-05-06 12:34:21')
print(o3)
print('- - - - - - - -')
o = DatetimeConverter.bulid_conveter_with_other_formatter('2019/05/06 12:34:21', '%Y/%m/%d %H:%M:%S')
print(o)
print(o.date_str)
print(o.timestamp)
print('***************')
o2 = o.one_hour_ago_datetime_converter
print(o2)
print(o2.date_str)
print(o2.timestamp)
print(o2.is_greater_than_now())
print(o2(), type(o2()))
print(DatetimeConverter())