📜  Python strftime()函数

📅  最后修改于: 2022-05-13 01:54:28.956000             🧑  作者: Mango

Python strftime()函数

strftime()函数用于将日期和时间对象转换为其字符串表示形式。它接受一个或多个格式化代码输入并返回字符串表示。

句法 :

strftime(format)

Returns :它返回日期或时间对象的字符串表示形式。

格式代码列表:格式代码参考表。

DirectiveMeaningOutput Format
%aAbbreviated weekday name.Sun, Mon, …
%AFull weekday name.Sunday, Monday, …
%wWeekday as a decimal number.0, 1, …, 6
%dDay of the month as a zero added decimal.01, 02, …, 31
%-dDay of the month as a decimal number.1, 2, …, 30
%bAbbreviated month name.Jan, Feb, …, Dec
%BFull month name.January, February, …
%mMonth as a zero added decimal number.01, 02, …, 12
%-mMonth as a decimal number.1, 2, …, 12
%yYear without century as a zero added decimal number.00, 01, …, 99
%-yYear without century as a decimal number.0, 1, …, 99
%YYear with century as a decimal number.2013, 2019 etc.
%HHour (24-hour clock) as a zero added decimal number.00, 01, …, 23
%-HHour (24-hour clock) as a decimal number.0, 1, …, 23
%IHour (12-hour clock) as a zero added decimal number.01, 02, …, 12
%-IHour (12-hour clock) as a decimal number.1, 2, … 12
%pLocale’s AM or PM.AM, PM
%MMinute as a zero added decimal number.00, 01, …, 59
%-MMinute as a decimal number.0, 1, …, 59
%SSecond as a zero added decimal number.00, 01, …, 59
%-SSecond as a decimal number.0, 1, …, 59
%fMicrosecond as a decimal number, zero added on the left.000000 – 999999
%zUTC offset in the form +HHMM or -HHMM. 
%ZTime zone name. 
%jDay of the year as a zero added decimal number.001, 002, …, 366
%-jDay of the year as a decimal number.1, 2, …, 366
%UWeek number of the year (Sunday as the first day of the week). All days in a new year preceding the first Sunday are considered to be in week 0.00, 01, …, 53
%WWeek number of the year (Monday as the first day of the week). All days in a new year preceding the first Monday are considered to be in week 0.00, 01, …, 53

例子:

# Python program to demonstrate
# strftime() function
  
  
from datetime import datetime as dt
  
# Getting current date and time
now = dt.now()
print("Without formatting", now)
  
# Example 1
s = now.strftime("%a %m %y")
print('\nExample 1:', s)
  
# Example 2
s = now.strftime("%A %-m %Y")
print('\nExample 2:', s)
  
# Example 3
s = now.strftime("%-I %p %S")
print('\nExample 3:', s)
  
# Example 4
s = now.strftime("%-j")
print('\nExample 4:', s)

输出:

Without formatting 2019-12-17 18:21:39.211378

Example 1: Tue-12-19

Example 2: Tuesday-12-2019

Example 3: 6 PM 39

Example 4: 351