Python Time processing datetime

operating Environment: Python3.4

 #-*-Coding:utf-8-*-#datetime类 #datetime是date与time的结合体, including all information about date and time. #它的构造函数如下: #datetime. DateTime (year, month, day[, hour[, minute[, second[, microsecond[, Tzinfo]]] #各参数的含义与date, as in the constructor of time, be aware




The range of parameter values. # 1. Class properties and methods defined by the DateTime class: #datetime. Min, datetime.max:datetime can represent the minimum and maximum value; #print: datetime.max:9999-12-31 23:59:59.999999 #print: datetime.min:0001-01-01 00:00:00 from datetime import * Import time print (' Datetime.max: ' +str (Datetime.max)) print (' Datetime.min: ' +str (datetime.min)) #datetime. Resolution:datetime minimum Unit; #print: DATETIME.R esolution:0:00:00.000001 print (' datetime.resolution: ' + str (datetime.resolution)) #datetime. Today () : Returns a DateTime object that represents the current local time; #print: Today (): 2012-09-12 19:37:50.721000 print (' Today (): ' +str (Datetime.today ()) #datet Ime.now ([TZ]): Returns a DateTime object that represents the current local time, and if a parameter tz is supplied, gets the local time of the time zone referred to by the TZ parameter; #print: Now (): 2012-09-12 19:37:50.738000 print (' Now (): ' +str (DateTime.Now ()) #datetime. UtcNow (): Returns a date of the current UTC timeTime object; #print: 2012-09-12 11:37:50.739000 print (' UtcNow (): ' +str (Datetime.utcnow ()) #datetime. Fromtimestamp (timest amp[, TZ]: Creates a DateTime object based on the timestamp, parameter TZ Specifies the time zone information; #print: Fromtimestamp (tmstmp): 2012-09-12 19:37:50.741000 print (' Fromtimestamp (tmstmp): ' +str (Datetime.fromtimestamp (Time.time ())) #datetime. Utcfromtimestamp (timestamp) : Creates a DateTime object based on the timestamp; #print: Utcfromtimestamp (tmstmp): 2012-09-12 11:37:50.742000 print (' Utcfromtimestamp (tmstmp): ' +str (Datetime.utcfromtimestamp (Time.time ())) #datetime. Combine (date, time): Creates a DateTime object based on date and time; #print: Datetime.combine (date,time): 2012-09-12 19:46:05 d = Date (2012,9,12) from datetime import * t = time (19,46,5) print ( ' Datetime.combine (date,time): ' +str (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 provided by the DateTime class and the attribute dt = Datetime.strptime ("2012-09-12 21:08:12", "%y-%m-%d%h:%m:%S ") #print: 9 8 0 None print (dt.year) print (dt.month) print (dt.day) print (dt.hour) print (dt.minute) print (d T.second) print (dt.microsecond) print (dt.tzinfo) print (Dt.date ()) print (Dt.time ()) Print (Dt.replace (year = 2013)) Prin T (dt.timetuple ()) print (Dt.utctimetuple ()) print (Dt.toordinal ()) print (Dt.weekday ()) print (Dt.isocalendar ()) #print Dt.isoformat ([Sep]) #datetime. CTime (): Returns a date-time C format string that is equivalent to Time.ctime (Time.mktime (Dt.timetuple ()); #3. Format string # DateTime. Strftime (format) #%a week's abbreviation. As Wednesday for the Web #%A week full write. For example, Wednesday is the shorthand for Wednesday #%b month. such as April for the APR #%b month Full write. such as the string representation of the April #%c: DateTime in April. (For example: 04/07/10 10:43:39) #%d: Days in this month (is the day of the months) #%f: microseconds (range [0,999999]) #%H: Hours (24 hours, [0,]) #%I: Hours (12 hours, [0, 11] ) #%j: Days in the year [001,366] (is day of the year) #%m: Month ([01,12]) #%m: minutes ([00,59]) #%p:am or PM #%s: seconds (range is [00,61], why not [00, 59],  Reference to the Python manual ~_~) #%u: Weeks in the year of the Week of the year of the first few weeks, Sunday as the first day of the week #%w: Today in this week's number of days, the range is [0, 6],6 represents Sunday #%w: Weeks in the current year (is the week of the year), Monday as the first day of the Week #%x: Date string (such as: 04/07/10) # %x: Time string (such as: 10:43:39) #%y:2 number of years #%y:4 number of years #%z: Interval from UTC (If local time, return an empty string) #%z: Time zone name (if local time, return an empty string) # Percent%:%% =>% dt = DateTime.Now () #print: (%y-%m-%d%h:%m:%s%f): 2012-09-12 23:04:27 145000 print ('%y-%m-%d%h:%m: %s%f): ' + str (dt.strftime ('%y-%m-%d%h:%m:%s%f ')) #print: (%y-%m-%d%h:%m:%s%p): 12-09-12 11:04:27 PM print (' (%y-%m- %d%h:%m:%s%p): ' +str (Dt.strftime ('%y-%m-%d%i:%m:%s%p ')) #print:%a:wed print ('%%a:%s '% dt.strftime ('%a ')) #pri NT:%a:wednesday print ('%%a:%s '% dt.strftime ('%A ') #print:%b:sep print ('%%b:%s '% dt.strftime ('%b ')) #print:% B:september print ('%%b:%s '% dt.strftime ('%B ') #print: DateTime%c:09/12/12 23:04:27 print (' DateTime%%c:%s '% dt.strftime ( '%c ') #print: Date%x:09/12/12 print ('%%x:%s '% dt.strftime ('%x ')) #print: Time%x:23:04:27 print (' Time%%x:%s '% Dt.strftim E ('%x ') #print: Today is the 3rd day of the Week print (' Today is this week's%s day '% dt.strftime ('%w ')) #print: Today is the NO. 256 day of this year print (' Today is the first%s day '% of this year Dt.strfti Me ('%j ') #print: This week is this year'sWeek 37th print (' This is this week's%s week '% dt.strftime ('%u ')]
 

Run Results

atetime.max:9999-12-31 23:59:59.999999
datetime.min:0001-01-01 00:00:00
datetime.resolution:0:0 0:00.000001 Today
(): 2014-05-04 15:58:18.141186 now
(): 2014-05-04 15:58:18.193146 utcnow
(): 2014-05-04 07:58:18.243958
Fromtimestamp (tmstmp): 2014-05-04 15:58:18.291558 utcfromtimestamp
(tmstmp): 2014-05-04 07:58:18.342550
Datetime.combine (date,time): 2012-09-12 19:46:05 2007-03-04 21:08:12
9
8
0
None
2012-09-12
21:08:12
2013-09-12 21:08:12
Time.struct_time (tm_year=2012, tm_mon=9, tm_mday=12, tm_hour=21, Tm_min=8, tm_sec=12, tm_wday=2, tm_yday=256, TM_ISDST =-1)
time.struct_time (tm_year=2012, tm_mon=9, tm_mday=12, tm_hour=21, Tm_min=8, tm_sec=12, tm_wday=2, tm_yday= 256, tm_isdst=0)
734758
2 (
3)
(%y-%m-%d%h:%m:%s%f): 2014-05-04 15:58:19
(% y-%m-%d%h:%m:%s%p): 14-05-04 03:58:19 PM
%a:sun 
%a:sunday%b:may%b:may 
Date Time%c:sun may
  4 15:58:19 2014 
date%x:05/04/14 
time%x:15:58:19 
today is the No. 0 day of the week 
today is the 124th day of this year 

operating Environment: python2.x

 #-*-Coding:utf-8-*-#datetime类 #datetime是date与time的结合体, including all information about date and time. #它的构造函数如下: #datetime. DateTime (year, month, day[, hour[, minute[, second[, microsecond[, Tzinfo]]] #各参数的含义与date, as in the constructor of time, be aware




The range of parameter values. # 1. Class properties and methods defined by the DateTime class: #datetime. Min, datetime.max:datetime can represent the minimum and maximum value; #print: datetime.max:9999-12-31  23:59:59.999999 #print: datetime.min:0001-01-01 00:00:00 from datetime import * Import time print ' Datetime.max: ', Datetime.max print ' datetime.min: ', datetime.min #datetime. resolution:datetime smallest unit; #print: datetime.resolution:0 : 00:00.000001 print ' datetime.resolution: ', Datetime.resolution #datetime. Today (): Returns a DateTime object that represents the current local time; #print: Today (): 2012-09-12 19:37:50.721000 print ' Today (): ', Datetime.today () #datetime. Now ([TZ]): Returns a DateTime object that represents the current local time. Gets the local time of the time zone that the TZ parameter refers to, if the parameter tz is provided; #print: Now (): 2012-09-12 19:37:50.738000 print ' Now (): ', DateTime.Now () #datetime. UtcNow ( ): Returns a DateTime object for the current UTC time; #print: 2012-09-12 11:37:50.739000 print ' UtcNow (): ', Datetime.utcnow () #datetime. Fromtimestamp (timestamp[, TZ]): Creates a DateTime object based on the timestamp, Parameter TZ Specify the time zone information; #print: Fromtimestamp (tmstmp): 2012-09-12 19:37:50.741000 print ' Fromtimestamp (tmstmp): ', Datetime.fromtimestamp (Time.time ()) #datetime. Utcfromtimestamp (timestamp): Creates a DateTime object based on the timestamp; #print: Utcfromtimestamp (tmstmp): 2012-09-12 11:37:50.742000 print ' Utcfromtimestamp (tmstmp): ', Datetime.utcfromtimestamp (  Time.time ()) #datetime. Combine (date, time): Creates a DateTime object based on date and time; #print: Datetime.combine (date,time): 2012-09-12 19:46:05 d = Date (2012,9,12) from datetime import * t = time (19,46,5) 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. Instance methods and properties provided by the DateTime class dt = Datetime.strptime ("2012-09-12 21:08:12", "%y-%m-%d%h:%m:%s") #print: 9 8 0 None PR int Dt.year,dt.montH,dt.day,dt.hour,dt.minute,dt.second,dt.microsecond,dt.tzinfo print dt.date () print dt.time () print dt.replace (year = 2013) Print dt.timetuple () print dt.utctimetuple () print dt.toordinal () print dt.weekday () #print D T.isoformat ([Sep]) #datetime. CTime (): Returns a date-time C format string that is equivalent to Time.ctime (Time.mktime (Dt.timetuple ()); #3. Format string # DateTime. Strftime (format) #%a week's abbreviation. As Wednesday for the Web #%A week full write. For example, Wednesday is the shorthand for Wednesday #%b month. such as April for the APR #%b month Full write. such as the string representation of the April #%c: DateTime in April. (For example: 04/07/10 10:43:39) #%d: Days in this month (is the day of the months) #%f: microseconds (range [0,999999]) #%H: Hours (24 hours, [0,]) #%I: Hours (12 hours, [0, 11] ) #%j: Days in the year [001,366] (is day of the year) #%m: Month ([01,12]) #%m: minutes ([00,59]) #%p:am or PM #%s: seconds (range is [00,61], why not [00, 59],  Reference to the Python manual ~_~) #%u: Weeks in the year of the Week of the year of the first few weeks, Sunday as the first day of the week #%w: Today in this week's number of days, the range is [0, 6],6 represents Sunday #%w: Weeks in the current year (is the week of the year), Monday as the first day of the Week #%x: Date strings (such as: 04/07/10) #%x: Time strings (such as: 10:43:39) #%y:2 number of years #%y:4 number of years #%z: Interval from UTC (If local time, return an empty string) #%z: Time zone name Call (if local time, return an empty string) #%%:  Percent =>% dt = DateTime.Now () #print: (%y-%m-%d%h:%m:%s%f): 2012-09-12 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 PM print ' (%y-%m-%d%h:%m:%s %p): ', Dt.strftime ('%y-%m-%d%i:%m:%s%p ') #print:%a:wed print '%%a:%s '% dt.strftime ('%a ') #print:%a:wednesday p Rint '%%a:%s '% dt.strftime ('%A ') #print:%b:sep print '%%b:%s '% dt.strftime ('%b ') #print:%b:september print '%%b :%s '% dt.strftime ('%B ') #print: Date time%C:09/12/12 23:04:27 print ' Date time%%c:%s '% dt.strftime ('%c ') #print: Date%X:09/12/1 2 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 Prin T ' today is the first%s day of the week '% dt.strftime ('%w ') #print: Today is the NO. 256 day of this year print ' Today is this year's%s day '% dt.strftime ('%j ') #print: This week is the 37th week of this year print

 ' This week is the first%s week of this year '% dt.strftime ('%u ')