Python Basics-Day 5 learning note-Standard library of modules: Time (1)

How time is expressed

1. inter-stamp timestamp: An offset calculated in seconds from January 1, 1970 00:00:00, rendered as a float data type. The functions that return timestamps are: Time (), clock (), and so on.

2. Sruct_time : Functions that return struct_time Ganso include Gmtime (), localtime (), Strptim (). The returned Ganso consists of the following 9 elements.

Indexed index	Property ATTRIBUTE	Value values
0	Tm_year	Like 2011.
1	Tm_mon	1-12
2	Tm_mday	1-31
3	Tm_hour	0-23
4	Tm_min	0-59
5	Tm_sec	0-61
6	Tm_wday	0-6 (0 = Sunday)
7	Tm_yday (day ordinal of the year)	1-366
8	TM_ISDST (whether daylight saving time)	Default #:-1

* Note-time zone: UTC (Coordinated Universal Time, world co-ordination). China utc+8. Dst:daylight Saving Time

3. formatted time string parsing and formattingtimes: The following format time string format expression

Format	Meaning
%a	Local Simplified Week name
%A	Local Full week name
%b	Local Simplified month name
%B	Local Full month name
%c	Local corresponding date and time representation
%d	Day of the one months (01-31)
%H	Hours of the day (24-hour, 00-23)
%I	Number of hours (12-hour, 01-12)
%j	Day of the Year (001-366)
%m	Month (01-12)
%M	Number of minutes (00-59)
%p	The corresponding character of the local AM or PM; use with%i
%s	Seconds (01-61)
%u	The number of weeks in a year. (00-53 weeks is the beginning of one weeks.) ） All days before the first Sunday are placed in the No. 0 week
%w	The day of the one week (0-6,0 is Sunday)
%W	and%u basically the same, the difference is%w with Monday for the start of the week
%x	Local corresponding date
%x	Local corresponding time
%y	The year of the century was removed (00-99)
%Y	The full year
%Z	The name of the time zone (if it does not exist as a null character)
%%	% character

Common Operations

Import TimePrint(Time.localtime ())#returns the struct_time of the current timePrint(Time.localtime (1304575584.1361799))#time.struct_time (tm_year=2011, tm_mon=5, tm_mday=5, tm_hour=14, tm_min=6, tm_sec=24, tm_wday=3, tm_yday=125, tm_ isdst=0)#Convert the timestamp to the struct_time of the current time zone.Print(Time.gmtime ())#similar to LocalTime, Gmtime is the struct_time of converting timestamps to utc+0 time zonesPrint(Time.time ())#returns the timestamp of the current timePrint(Time.mktime (Time.localtime ())) T= (2019, 2, 15,10,13,38,1,48,0)#TupletimePrint(Time.mktime (t))#back to 1550196818.0#Convert a struct_time to a timestampPrint(Time.asctime ())#convert the progenitor or struct_time into the form of "Sun 20 12:30:11 2017"#if there are no arguments, the time.localtime () will be passed in as a parameterPrint(Time.ctime ())#convert timestamp to "Sun 20 12:30:11 2017" formPrint(Time.strftime ('%y-%m-%d%x', Time.localtime ()))#2017-08-20 20:33:15#to convert a struct_time tuple to a formatted time stringPrint(Time.strptime ('2011-05-05 16:37:06',"%y-%m-%d%x"))#time.struct_time (tm_year=2011, tm_mon=5, tm_mday=5, tm_hour=16, tm_min=37, tm_sec=6, tm_wday=3, tm_yday=125, tm_ Isdst=-1)#Convert a formatted time string to a struct_time tuplePrint(Time.sleep (1))#delay the thread for T-seconds execution

1 Import Time2 3Time.sleep (2)4 Print("clock1:%s"% Time.clock ())#return is program run time5Time.sleep (2)6 Print("clock2:%s"% Time.clock ())#return is the time interval from the first time.clock7Time.sleep (2)8 Print("clock3:%s"% Time.clock ())#return is the time interval from the first time.clock

Special Time.clock.

conversion of the expression to each other

Python Basics-Day 5 learning note-Standard library of modules: Time (1)