Summary of usage and common methods of datetime module in Python

This article brings you a summary of the usage and common methods of the datetime module in Python. It has certain reference value. Friends in need can refer to it. I hope it will be helpful to you.

The datetime module re-encapsulates the time module to provide more interfaces. The classes provided are:

date, a class representing date

time, a class representing time

datetime, a class representing date and time

timedelta, representing a time interval, that is, the interval between two points in time

tzinfo, information related to time zones

(Objects of these classes are all immutable)

(Classes have class methods, class methods have methods, and methods inherit class methods)

1. Date class

##datetime.date(year, month, day)

Commonly used class methods and attributes:

Implementation:

Class method

import datetime
import time
print(datetime.date.max)
print(datetime.date.min)
print(datetime.date.today())
print(datetime.date.resolution)
print(datetime.date.fromtimestamp(time.time()+3600000))      # 给定时间戳的 日期

result

9999-12-31
0001-01-01
2018-09-17
1 day, 0:00:00
2018-10-29

where Commonly used methods and properties:

实现：

方法

print(datetime.date.year)              # <attribute &#39;year&#39; of &#39;datetime.date&#39; objects>
print(datetime.date.today().year)     # 本地时时间的年
print(datetime.date.fromtimestamp(time.time()+3600000).month)   # 给定时间戳的 月
print(datetime.date.today().day)  # 日

print(datetime.date.today().replace(year=2019))
print(datetime.date.today().timetuple())
print(datetime.date.today().toordinal())
print(datetime.date.today().weekday())
print(datetime.date.today().isoweekday())
print(datetime.date.today().isocalendar())
print(datetime.date.today().isoformat())
print(datetime.date.today().strftime(&#39;%Y-%m-%d-%a-%I&#39;))

result

<attribute &#39;year&#39; of &#39;datetime.date&#39; objects>
10
2019-09-17
time.struct_time(tm_year=2018, tm_mon=9, tm_mday=17, tm_hour=0, tm_min=0, tm_sec=0, tm_wday=0, tm_yday=260, tm_isdst=-1)
0
(2018, 38, 1)
2018-09-17
2018-09-17-Mon-12

result

2、time类

其中，time类和time模块各自独立

datetime.time(hour[,minute[,decond[,microsecond[,tzinfo]]]])

常用的类方法与属性：

常用的方法与属性：

3. Datetime class

is equivalent to combining date and time

datetime.datetime(year,month,day[,hour[,minute[,second[,microsecond[,tzinfo]]]]])

## Commonly used class methods and Properties:

import datetime
import time
print(datetime.datetime.resolution)
print(datetime.datetime.today())
print(datetime.datetime.now())
print(datetime.datetime.utcnow())
print(datetime.datetime.fromtimestamp(time.time()))
print(datetime.datetime.utcfromtimestamp(time.time()))
print(datetime.datetime.combine(datetime.date(2019, 3, 5), datetime.time(3, 2, 45)))
print(datetime.datetime.strftime(datetime.date(2019,9,2),'%Y-%m-%d %X'))

0:00:00.000001
2018-09-17 20:32:36.868500
2018-09-17 20:32:36.868500
2018-09-17 12:32:36.868500
2018-09-17 20:32:36.868500
2018-09-17 12:32:36.868500
2019-03-05 03:02:45
2019-09-02 00:00:00

import datetime,time
print(datetime.datetime.today().tzinfo)
print(datetime.datetime.today().date())
print(datetime.datetime.today().time())
print(datetime.datetime.today().timetz())
print(datetime.datetime.today().timetuple())
print(datetime.datetime.today().timestamp())
print(datetime.datetime.today().ctime())

None
2018-09-17
20:36:47.560500
20:36:47.560500
time.struct_time(tm_year=2018, tm_mon=9, tm_mday=17, tm_hour=20, tm_min=36, tm_sec=47, tm_wday=0, tm_yday=260, tm_isdst=-1)
1537187807.5605
Mon Sep 17 20:36:47 2018

m = datetime.datetime.now()
print(m)
l = m + datetime.timedelta(3)
print(l)
n = m + datetime.timedelta(hours=4)
print(n)
span = l-m
print(span)
print(span.total_seconds())

2018-09-17 16:38:43.021000
2018-09-20 16:38:43.021000
2018-09-17 20:38:43.021000
3 days, 0:00:00
259200.0