Use of the Python time module and the DateTime module

Tag: Time () clock text datetime off tuple res--element

Time Module

Time Module

Time Representation format:

1.格式化时间: 【 2018-01-01 01:00:00 】2.时间戳: 【 1518407077.940927 】 -> 秒数(从1970开始到现今)3.以元组方式表示，九个元素(格式化元组)  元素如下:    (1)  tm_year=2018,  # 年    (2)  tm_mon=2,      # 月    (3)  tm_mday=12,    # 日    (4)  tm_hour=11,    # 小时    (5)  tm_min=49,     # 分钟    (6)  tm_sec=13,     # 秒    (7)  tm_wday=0,     # 0(Mon)-6(Sun) 从0(周一)开始数 -> 6(周天)    (8)  tm_yday=43,    # 今年的第几天    (9)  tm_isdst=0     # 时区，如果是1，则表示夏令时

Use

• timezoneReturn time standard actual vs. current difference (seconds)

  In [45]: time.timezoneOut[45]: -28800In [46]: time.timezone / 3600Out[46]: -8.0   # 中国时间与标准时间相差8小时

• altzoneand timezone almost

• daylightTo see if you're using daylight saving time, 0 means not using

  In [50]: time.daylightOut[50]: 0

• time ()Returns the current timestamp

  In [37]: time.time()Out[37]: 1518407588.8324711

• sleep ()Pause the program for a few seconds

  In [51]: time.sleep(3)In [52]:

• gmtime ()Incoming timestamp, return formatted tuple "UTC time Zone"

  In [54]: time.gmtime(time.time())Out[54]: time.struct_time(tm_year=2018, tm_mon=2, tm_mday=12, tm_hour=4, tm_min=7, tm_sec=50, tm_wday=0, tm_yday=43, tm_isdst=0)

• localtime ()Incoming timestamp, return formatted tuple (no parameter passed, default current time) "based on local area"

  In [55]: time.localtime()Out[55]: time.struct_time(tm_year=2018, tm_mon=2, tm_mday=12, tm_hour=12, tm_min=10, tm_sec=13, tm_wday=0, tm_yday=43, tm_isdst=0)

  In [56]: time.localtime(123123123)Out[56]: time.struct_time(tm_year=1973, tm_mon=11, tm_mday=26, tm_hour=8, tm_min=52, tm_sec=3, tm_wday=0, tm_yday=330, tm_isdst=0)

To remove the tuple data:

  In [57]: a = time.localtime()  In [58]: a.tm_year # 取出年份  Out[58]: 2018  In [59]: a.tm_mon  # 取出月份  Out[59]: 2  In [60]: a.tm_sec # 取出分钟  Out[60]: 54

• mktime ()Convert from tuple to timestamp

  In [63]: time.mktime(time.localtime())Out[63]: 1518409129.0

• strftime (format,tuple)--> string Custom Generate format time, string

  1. Format operation

     % Y Ye Ar with century as a decimal number.
     %m Month as a decimal number [01,12].
     %d day of the month as a decimal number [01,31].
     % H Hour (24-hour clock) as a decimal number [00,23].
     % M Minute as a decimal number [00,59].
     % S Second as a decimal number [00,61].
     %z time zone offset from UTC.
     % A Locale ' s abbreviated weekday name.
     % A Locale ' s full weekday name.
     %b Locale ' s abbreviated month name.
     % B Locale ' s full month name.
     %c Locale ' s appropriate date and time representation.
     %I Hour (12-hour clock) as a decimal number [01,12].
     %p Locale ' s equivalent of either AM or PM

    2. Use: in []: Time.strftime ('%y-%m-%d ', Time.localtime ()) out[67]: ' 2018-02-12 '  

• ctime ()Incoming timestamp, return text-time

  In [69]: time.ctime()Out[69]: ‘Mon Feb 12 12:30:44 2018‘In [77]: time.ctime(123123123)Out[77]: ‘Mon Nov 26 08:52:03 1973‘

• asctime ()Incoming formatted tuple, return text-time

  In [79]: time.asctime(time.localtime(123123))Out[79]: ‘Fri Jan  2 18:12:03 1970‘

  In [80]: time.asctime()Out[80]: ‘Mon Feb 12 12:34:23 2018‘

DateTime module

Datetie Module

• datetime.now ()Return Current time

  In [156]: print(datetime.datetime.now())In [156]: 2018-02-12 12:39:43.309016

Time arithmetic

In [174]: datetime.datetime.now() + datetime.timedelta(1)Out[174]: datetime.datetime(2018, 2, 13, 12, 43, 12, 301435)

In [175]: datetime.datetime.now() - datetime.timedelta(1)Out[175]: datetime.datetime(2018, 2, 11, 12, 43, 28, 154795)

In [181]: datetime.datetime.now() + datetime.timedelta(hours=1)Out[181]: datetime.datetime(2018, 2, 12, 13, 44, 54, 816476)

In [182]: datetime.datetime.now() + datetime.timedelta(hours=1)Out[182]: datetime.datetime(2018, 2, 12, 13, 44, 56, 429732)

Use of the Python time module and the DateTime module