一、datetime包
1.timedelta(params…)得到一个时间增量对象
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# coding:utf-8from datetime import timedeltaif __name__ == '__main__': # 常用参数 hours:小时 days:天 seconds:秒 milliseconds:毫秒 delta = timedelta(hours=2) print(delta) # 2:00:00 print(type(delta)) # <class 'datetime.timedelta'> |
2.timezone(timedelta) + timedelta(params…) 创建时区对象
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# coding:utf-8from datetime import timedelta, timezoneif __name__ == '__main__': delta = timedelta(hours=2) zone = timezone(delta) #配合timedelta创建时区对象 print(zone) # UTC+02:00 print(type(zone)) # <class 'datetime.timezone'> |
3.datetime模块
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datetime.now(timezone) 获取当前时间datetime对象# coding:utf-8from datetime import timedelta, timezone, datetimeif __name__ == '__main__': ''' 获取当前时间，可以获取指定时区的当前时间 datetime.now(timezone) ''' now = datetime.now() print(now) # 2022-02-23 13:59:59.224286 print(type(now)) # <class 'datetime.datetime'> # 设置指定时区的当前时间 print(datetime.now((timezone(timedelta(hours=9))))) # 2022-02-23 14:59:59.224286+09:00 |
datetime.strftime(fmt) datetime时间对象转字符串
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# coding:utf-8from datetime import datetimeif __name__ == '__main__': ''' datetime.strftime(fmt) 将时间对象转换成字符串 fmt:格式化标准，由格式符组成 常用格式符(年:%Y,月:%m,日:%D,时:%H,分:%M,秒:%S) ''' now = datetime.now() print(now.strftime('%Y-%m-%d %H:%M:%S')) # 2022-02-23 14:04:24 |
datetime.strptime(date_string,fmt) 字符串转成datetime时间对象
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# coding:utf-8from datetime import datetimeif __name__ == '__main__': ''' datetime.strptime(date_string,fmt) 将字符串转换成时间对象，要求date_string的格式完全匹配fmt格式化标准 ''' time_obj = datetime.strptime('2022-2-22', '%Y-%m-%d') # datetime.strptime('2022-2-22', '%Y-%m-%d %H') Error date_string 中不存在小时而fmt中要求有小时 print(datetime.strptime('2022-2-22 14', '%Y-%m-%d %H')) # 2022-02-22 14:00:00 print(time_obj) # 2022-02-22 00:00:00 print(type(time_obj)) # <class 'datetime.datetime'> |
datetime.timestamp(datetime_obj) 将datetime时间对象转换成秒级时间戳
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# coding:utf-8from datetime import datetimeif __name__ == '__main__': ''' datetime.timestamp(datetime_obj) datetime_obj:datetime 时间对象 返回 float ''' print(datetime.timestamp(datetime.now())) # 1645598565.715 |
datetime.fromtimestamp(t) 将秒级时间戳转换成datetime时间对象
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# coding:utf-8from datetime import datetime, timedelta, timezoneif __name__ == '__main__': ''' datetime.fromtimestamp(t) t:秒级时间戳 float类型 返回:datetime时间对象 ''' datetime_obj = datetime.fromtimestamp(1645598565.715) print(datetime_obj) # 2022-02-23 14:42:45.715000 print(type(datetime_obj)) # <class 'datetime.datetime'> |
4.使用datetime对象 + timedelta(params…) 进行时间运算
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# coding:utf-8from datetime import datetime, timedelta, timezoneif __name__ == '__main__': now = datetime.now() fmt = '%Y-%m-%d %H:%M:%S' print(now.strftime(fmt)) # 2022-02-23 15:07:01 # 3小时后时间 print((now + timedelta(hours=3)).strftime(fmt)) # 2022-02-23 18:07:01 # 3小时前时间 print((now - timedelta(hours=3)).strftime(fmt)) # 2022-02-23 12:07:01 print((now + timedelta(hours=-3)).strftime(fmt)) # 2022-02-23 12:07:01 # 建议timedelta的参数都使用正数(容易理解) |
二、time包
1.time.time() 得到当前秒级时间戳
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# coding:utf-8import timeif __name__ == '__main__': print(time.time()) # 1645667203.7236724 |
2.time.localtime(second) 将秒转换成time时间对象
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# coding:utf-8import timeif __name__ == '__main__': # second 不填，则默认当前的时间戳 t = time.localtime(time.time()) t2 = time.localtime() print(t) # time.struct_time(tm_year=2022, tm_mon=2, tm_mday=24, tm_hour=10, tm_min=10, tm_sec=8, tm_wday=3, tm_yday=55, tm_isdst=0) print(t2) # time.struct_time(tm_year=2022, tm_mon=2, tm_mday=24, tm_hour=10, tm_min=10, tm_sec=8, tm_wday=3, tm_yday=55, tm_isdst=0) print(type(t)) # <class 'time.struct_time'> print(type(t2)) # <class 'time.struct_time'> |
3.time.strftime(fmt,time_obj) 将time时间对象转换成字符串
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# coding:utf-8import timeif __name__ == '__main__': """ time.strftime(fmt,time_obj) fmt:格式化标准 参考 datetime.strftime(fmt) time_obj:time时间对象，不填默认是当前日期的time时间对象 """ t = time.localtime(time.time() + 3600) print(time.strftime('%Y-%m-%d %H:%M:%S')) # 2022-02-24 10:16:17 print(time.strftime('%Y-%m-%d %H:%M:%S', t)) # 2022-02-24 11:16:17 |
4.time.strptime(time_string,fmt) 将字符串转换成time时间对象
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# coding:utf-8import timeif __name__ == '__main__': """ time.strptime(time_string,fmt) 参考 datetime.strptime(date_string,fmt) time_string:时间字符串 fmt:格式化标准 """ fmt = '%Y-%m-%d %H:%M:%S' t = time.strftime(fmt, time.localtime()) print(t) # 2022-02-24 10:25:17 print(time.strptime(t, fmt)) # time.struct_time(tm_year=2022, tm_mon=2, tm_mday=24, tm_hour=10, tm_min=25, tm_sec=40, tm_wday=3, tm_yday=55, tm_isdst=-1) |
5.time.sleep(second) 休眠 second 秒
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# coding:utf-8import timeif __name__ == '__main__': print(time.time()) # 1645670183.6567423 time.sleep(2) print(time.time()) # 1645670185.6708047 |
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原文链接：https://blog.csdn.net/qq_29744347/article/details/123106570
