Datetime in Python Time Processing

#-*-Coding: UTF-8-*-# datetime class # datetime is a combination of date and time, including all information about date and time. # Its constructor is as follows: # datetime. datetime (year, month, day [, hour [, minute [, second [, microsecond [, tzinfo]) # The meaning of each parameter is the same as that in the date and time constructor. Pay attention to the parameter value range. #1. the class attributes and methods defined by the datetime class: # datetime. min, datetime. MAX: minimum and maximum values that can be expressed by datetime; # print: datetime. MAX: 9999-12-31 23:59:59. 999999 # print: datetime. min: 0001-01-01 00: 00: 00 from datetime import * import timeprint 'datetime. MAX: ', datetime. max print 'datetime. min: ', datetime. min # datetime. resolution: Minimum datetime unit; # print: datetime. resolution: 0:00:00. 000001 print 'datetime. resolution: ', datetime. resolution # dat Etime. today (): returns a datetime object indicating the current local time; # print: Today (): 19:37:50. 721000 print 'today (): ', datetime. today () # datetime. now ([TZ]): returns a datetime object that represents the current local time. If the TZ parameter is provided, obtain the local time in the time zone specified by the TZ parameter; # print: Now (): 19:37:50. 738000 print 'now (): ', datetime. now () # datetime. utcnow (): returns a datetime object of the current UTC time; # print: 11:37:50. 739000 print 'utcnow (): ', datetime. utcnow () # datetime. fromtimestamp (T Imestamp [, TZ]): Creates a datetime object based on the time period. The parameter TZ specifies the time zone information; # print: fromtimestamp (tmstmp): 19:37:50. 741000 print 'fromtimestamp (tmstmp): ', datetime. fromtimestamp (time. time () # datetime. utcfromtimestamp (timestamp): Create a datetime object based on the time sequence; # print: utcfromtimestamp (tmstmp): 11:37:50. 742000 print 'utcfromtimestamp (tmstmp): ', datetime. utcfromtimestamp (time. time () # datetime. combine (date, time): According to DA Te and time, create a datetime object; # print: datetime. combine (date, time): 2012-09-12 19: 46: 05d = Date (, 12) from datetime import * t = time (, 5) print 'datetime. combine (date, time): ', datetime. combine (D, T) # datetime. strptime (date_string, format): converts a format string to a datetime object; # print: 2007-03-04 21: 08: 12 print datetime. strptime ("2007-03-04 21:08:12", "% Y-% m-% d % H: % m: % s") #2. the instance method and attribute dt = datetime provided by the datetime class. strptime ("20 12-09-12 21:08:12 "," % Y-% m-% d % H: % m: % s ") # print: 2012 9 12 21 8 12 0 noneprint DT. year, DT. month, DT. day, DT. hour, DT. minute, DT. second, DT. microsecond, DT. tzinfoprint DT. date () print DT. time () print DT. replace (year = 2013) print DT. timetuple () print DT. utctimetuple () print DT. toordinal () print DT. weekday () print DT. isocalendar () # print DT. isoformat ([Sep]) # datetime. ctime (): returns a C-format string of date and time, which is equivalent to time. ctime (time. MKT IME (Dt. timetuple (); #3. Format String # datetime. strftime (Format) # % A abbreviation of the week. For example, Wednesday is the full write of Web # %. For example, Wednesday # % B is short for Wednesday. For example, if February is Apr # % B. For example, February April is a string representation of L # % C: Date and time. (For example, 04/07/10 10:43:39) # % d: the number of days in the month (the day of the month) # % F: microsecond (in the range of []) # % H: hour (in 24-hour format, [0, 23]) # % I: hour (in 12-hour format, [0, 11]) # % J: days in the year [001,366] (the day of the year) # % m: Month ([]) # % m: minute ([]) # % P: AM or PM # % s: Second (range: [], why not [00, 59], refer to the python manual ~ _~) # % U: The Week in the current year's week number in the current year), Sunday as the first day of the week # % W: the number of days of today in this week, the range is [0, 6], 6 indicates Sunday # % W: the number of weeks in the current year (the week of the current year), and Monday as the first day of the week # % x: Date string (for example, 04/07/10) # % x: Time string (for example, 10: 43: 39) # % Y: year represented by 2 digits # % Y: year represented by 4 digits # % Z: the interval between the time and UTC (if the local time is used, an empty string is returned) # % Z: Time Zone name (if the local time is used, an empty string is returned) # %: % => % dt = datetime. now () # print: (% Y-% m-% d % H: % m: % S % F ): 23:04:27 145000 print '(% Y-% m-% d % H: % m: % S % F):', DT. strftime ('% Y-% m-% d % H: % m: % S % F') # print: (% Y-% m-% d % H: % m: % S % P): 12-09-12 11:04:27 pmprint '(% Y-% m-% d % H: % m: % S % P ):', DT. strftime ('% Y-% m-% d % I: % m: % S % p') # print: % A: Wed print' %: % s' % DT. strftime ('% A') # print: % A: wednesdayprint' % A: % s' % DT. strftime ('% A') # print: % B: SEP print' % B: % s' % DT. strftime ('% B') # print: % B: septemberprint '% B: % s' % DT. strftime ('% B') # print: Date and Time % C: 09/12/12 23: 04: 27 print 'date and time % C: % s' % DT. strftime ('% C') # print: Date % x: 09/12/12 print' date % x: % s' % DT. strftime ('% x') # print: time % x: 23: 04: 27 print' time % x: % s' % DT. strftime ('% x') # print: Today is the 3rd day of the week. Print 'Today is the % s day of the week' % DT. strftime ('% W') # print: Today is the 256th day of this year. Print' today is the % s day of this year '% DT. strftime ('% J') # print: this week is the 37th week of this year print' this week is the % s week of this year '% DT. strftime ('% U') -- EOF -- Author: Once-ler | http://blog.csdn.net/wirelessqamailbox: wirelessqa.me@gmail.com Weibo: http://weibo.com/wirelessqa reprinted please indicate Source: Once-ler-http://blog.csdn.net/wirelessqa