Time and datatime)

The time and date functions in python are described in time and datatime. For more information, see 1. obtain the current time in two ways:

The code is as follows:

Import datetime, time
Now = time. strftime ("% Y-% m-% d % H: % M: % S ")
Print now
Now = datetime. datetime. now ()
Print now

2. get the date of the last day of the last month (the first day of the month minus one day)

The code is as follows:

Last = datetime. date (datetime. date. today (). year, datetime. date. today (). month, 1)-datetime. timedelta (1)
Print last

3. get the time difference (unit: seconds, usually used for calculating the time when the program runs)

The code is as follows:

Starttime = datetime. datetime. now ()
# Long running
Endtime = datetime. datetime. now ()
Print (endtime-starttime). seconds

4. calculate the last 10 hours of the current time.

The code is as follows:

D1 = datetime. datetime. now ()
D3 = d1 + datetime. timedelta (hours = 10)
D3.ctime ()

Common classes include datetime and timedelta. They can be added or subtracted from each other. Each class has some methods and attributes to view specific values, such as datetime: day, hour, and weekday; timedelta can be viewed as days and seconds.

5. time and date formatting symbols in python:

% Y two-digit year (00-99)
% Y indicates the four-digit year (000-9999)
% M month (01-12)
One day in % d Month (0-31)
% H Hour in 24-hour format (0-23)
% I 12-hour (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 date and time
% J one day in the year (001-366)
% P local equivalent of A. M. or P. M.
% U number of weeks in a year (00-53) Sunday is the start of the week
% W week (0-6), Sunday is the beginning of the week
% W number of weeks in a year (00-53) Monday is the start of the week
% X local date representation
% X local time representation
% Z current time zone name
% Itself