Introduction to the time module of the Python module

The following small series for you to bring a Python module of the time module (example explained). Small series feel very good, now share to everyone, also for everyone to make a reference. Let's take a look at it with a little knitting.

Time

Three forms of time representation

Timestamp (timestamp): Typically, a timestamp represents an offset that is calculated in seconds, starting January 1, 1970 00:00:00. We run "type (Time.time ())" and return the float type.

Formatted time string (format string): ' 1999-12-06 '

Time Formatting symbols

The%y two-digit year represents (00-99)%y four-digit year (000-9999)%m Month (01-12) the Day of the month (0-31)%H 24-hour hours (0-23)%I 12-hour hours (01-12)%M minutes (00=59)%s seconds (00-59)%a Local simplified week name%a Local full week name%b Local simplified month name%b Local full month name%c local corresponding date representation and time representation%j One day of the year (001-366)%p local a.m. or p.m. the number of weeks in the year (00-53) Sunday for the beginning of the week%w Weeks (0-6), Sunday for the beginning of the week%w the week of the Year (00-53) Monday for the beginning of the week%x Local corresponding date indicates%x local corresponding time represents%z current time zone's name%% number itself "'

Tuples (struct_time): Struct_time tuples Total 9 elements Total nine elements: (year, month, day, time, minute, second, week of the year, Day of the year, etc.)

Tuple element meaning

Index attribute (Attribute) value (values  )   tm_year (year)   Tm_mon (month)    1-12   tm_mday (day)   1-   Tm_hour (Hours)   0-23   tm_min (min)    0-59   tm_sec (sec)    0-61   Tm_wday (weekday)  0- 6 (0 = Sunday)   tm_yday (Day of the year) 1-366   tm_isdst (Daylight saving time) The default is-1 "" "

Several formats in Python that represent time

#导入时间模块 >>>import time# timestamp >>>time.time () 1500875844.800804# time string >>>time.strftime ("%Y-% m-%d%x ") ' 2017-07-24 13:54:37 ' >>>time.strftime ("%y-%m-%d%h-%m-%s ") ' 2017-07-24 13-55-04 ' #时间元组: LocalTime converts a timestamp to the current time zone Struct_timetime.gmtime () time.localtime () time.struct_time (tm_year=2017, tm_mon=7, tm_mday= Tm_hour=13, tm_min=59, tm_sec=37,      tm_wday=0, tm_yday=205, tm_isdst=0) # Summary: Time stamp is the time that the computer can recognize, time string is the time that people can understand; Tuples are used to manipulate the time

Conversion between various formatting times

#时间戳-to-structured time #time.gmtime (timestamp) #UTC时间, consistent #time.localtime (timestamp) #当地时间 with local time in London, UK. For example, we now implement this method in Beijing: 8 hours from UTC time, UTC time + 8 hours = Beijing Time >>>time.gmtime (1500000000) time.struct_time (tm_year=2017, tm_ Mon=7, tm_mday=14, tm_hour=2, tm_min=40, tm_sec=0, tm_wday=4, tm_yday=195, tm_isdst=0) >>>time.localtime ( 1500000000) Time.struct_time (tm_year=2017, tm_mon=7, tm_mday=14, tm_hour=10, tm_min=40, tm_sec=0, tm_wday=4, tm_yday= 195, tm_isdst=0) #结构化时间-time stamp #time. Mktime (structured time) >>>time_tuple = Time.localtime (1500000000) >>> Time.mktime (time_tuple) 1500000000.0

#结构化时间--String time #time.strftime ("format definition", "structured Time") if the structured time parameter does not pass, then the current time >>>time.strftime ("%y-%m-%d%x") 2017-07-24 14:55:36 ' >>>time.strftime ("%y-%m-%d", Time.localtime (1500000000)) ' 2017-07-14 ' #字符串时间-- Structured time #time.strptime (time string, string corresponding format) >>>time.strptime ("2017-03-16", "%y-%m-%d") Time.struct_time (tm_year= Tm_mon=3, Tm_mday=16, tm_hour=0, tm_min=0, tm_sec=0, tm_wday=3, tm_yday=75, Tm_isdst=-1) >>> Time.strptime ("07/24/2017", "%m/%d/%y") time.struct_time (tm_year=2017, tm_mon=7, tm_mday=24, tm_hour=0, tm_min=0, tm_ Sec=0, Tm_wday=0, tm_yday=205, Tm_isdst=-1)

#结构化时间--%a%b%d%h:%m:%s%y string #time.asctime (structured time) if the parameter is not passed, the format string of the current time is returned directly >>>time.asctime (Time.localtime ( 1500000000) ' Fri Jul 10:40:00 ' >>>time.asctime () ' Mon Jul 15:18:33 ' #%a%d%d%h:%m:%s%y string---structure Time #time.ctime (timestamp) If the parameter is not passed, the format string of the current time is returned directly >>>time.ctime () ' Mon Jul 15:19:07 ' >>>time.ctime ( 1500000000) ' Fri Jul 14 10:40:00 2017 '

Calculate Time Difference

Import Timetrue_time=time.mktime (Time.strptime (' 2017-09-11 08:30:00 ', '%y-%m-%d%h:%m:%s ')) Time_now=time.mktime ( Time.strptime (' 2017-09-12 11:00:00 ', '%y-%m-%d%h:%m:%s ')) Dif_time=time_now-true_timestruct_time=time.gmtime (dif_ Time) print ("%d%d-%d-hour%d-minute%d-seconds '% (struct_time.tm_year-1970,struct_time.tm_mon-1,          struct_time.tm_mday-1 , Struct_time.tm_hour,          struct_time.tm_min,struct_time.tm_sec))