Time module: acquisition and mutual transformation of timestamp, structured time and formatted time

Catalog

01 Get the current timestamp  

02 Get the current structured time

03 Get the current format time

 04 Mind map of mutual transformation

05  The mutual transformation of timestamp and structured time

06  The mutual transformation of structured time and formatted time

07  Understanding knowledge points

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01 Get the current timestamp  

Time stamp : Greenwich Time 1970 year 01 month 01 Japan 00 when 00 branch 00 second ( Beijing Time 1970 year 01 month 01 Japan 08 when 00 branch 00 second ) The total number of seconds since

import time
timestamp = time.time()

02 Get the current structured time

import time
struct_time = time.localtime()

 

03 Get the current format time

Method 1

import time
format_time = time.strftime('%Y-%m-%d %H:%M:%S %p')
# %Y、%m、%d... Is a special character , Indicate year 、 month 、 Japan ...

  This is the official document explanation , Translation in brackets

%Y  Year with century as a decimal number.( year )
%m  Month as a decimal number [01,12].( month )
%d  Day of the month as a decimal number [01,31].( Japan )
%H  Hour (24-hour clock) as a decimal number [00,23].( when -24 when )
%M  Minute as a decimal number [00,59].( branch )
%S  Second as a decimal number [00,61].( second )
%z  Time zone offset from UTC.( International standard time and local time ( East eight district Beijing time ) The time difference )
%a  Locale's abbreviated weekday name.( What day - Abbreviation )
%A  Locale's full weekday name.( What day - Full name )
%b  Locale's abbreviated month name.( The name of the month - Abbreviation )
%B  Locale's full month name.( The name of the month - Full name )
%c  Locale's appropriate date and time representation.(linux Time format of )
%I  Hour (12-hour clock) as a decimal number [01,12].( when -12 when )
%p  Locale's equivalent of either AM or PM.( In the morning  or  Afternoon )

(%x --> when / branch / second )

The above is also acceptable :

import time
format_time = time.strftime('%Y-%m-%d %X %p')
#  namely  %X  Equivalent to  %H:%M:%S  The format of 

Method 2 ( Format cannot be customized )

import datetime
format_time = datetime.datetime.now()  #  Get local time ( East eight time )
#  understand : Get international standard time 
format_utc_time = datetime.datetime.utctime()

 

The format is constant : %Y-%m-%d %H:%M:%S 

 04 Mind map of mutual transformation

Maybe it will be helpful for the next time format conversion

05  The mutual transformation of timestamp and structured time

Time stamp (timestamp) --> Structured time (struct_time)====>time.localtime(timestamp)

import time
timestamp = 3333333  #  Let me give you a random example 
struct_time = time.localtime(timestamp)  #  If there is no reference , The default incoming time.time() The current timestamp 

 

Structured time (struct_time -->   Time stamp (timestamp)====>time.mktime(struct_time)

import time
struct_time = time.localtime()  #  Take the current structured time as an example 
timestamp = time.mktime(struct_time)  #  Incoming structured time 

 

 

06  The mutual transformation of structured time and formatted time

Structured time (struct_time) --> Format time (format_time)====>time.strftime(format, struct_time)

import time
struct_time = time.localtime()  #  Take the current structured time as an example 
format_time = time.strftime('%Y-%m-%d %H:%M:%S', struct_time)
#  Parameters 1 The format is determined by yourself ,  Parameter 2 is passed into the structured time , If not, the current structured time will be defaulted 

 

Format time (format_time) --> Structured time (struct_time)====>time.strptime(format_time, format) 

import time
format_time = time.strftime('%Y-%m-%d')  #  Suppose, for example, the format time of such a format 
struct_time = time.strptime(format_time, '%Y-%m-%d')
#  Parameters 1 Given formatting time , Parameters 2 Given the format of the previous format time 

07  Understanding knowledge points

The timestamp is directly converted to the formatted time ( The format is fixed to %Y-%m-%d %H:%M:%S  Can't customize )

import datetime
import time
timestamp = time.time()
format_time = datetime.datetime.fromtimestamp(timestamp)  #  Incoming timestamp