Python strftime()用法及代碼示例

在Python中，日期和時間不是其自身的數據類型，而是名為datetime可以導入以處理日期和時間。 Datetime模塊內置於Python中，因此無需在外部安裝它。 Python中的datetime模塊為類提供了許多處理日期和時間的函數。

strftime()函數用於將日期和時間對象轉換為其字符串表示形式。它需要一個或多個格式化代碼輸入，並返回字符串表示形式。

用法:

strftime(format)

返回值：它返回日期或時間對象的字符串表示形式。

格式代碼列表：格式代碼參考表。

指示	含義	輸出格式
%a	Abbreviated weekday name.	Sun, Mon, …
%A	Full weekday name.	Sunday, Monday, …
%w	Weekday as a decimal number.	0, 1, …, 6
%d	Day of the month as a zero added decimal.	01, 02, …, 31
%-d	Day of the month as a decimal number.	1, 2, …, 30
%b	Abbreviated month name.	Jan, Feb, …, Dec
%B	Full month name.	January, February, …
%m	Month as a zero added decimal number.	01, 02, …, 12
%-m	Month as a decimal number.	1, 2, …, 12
%y	Year without century as a zero added decimal number.	00, 01, …, 99
%-y	Year without century as a decimal number.	0, 1, …, 99
%Y	Year with century as a decimal number.	2013, 2019 etc.
%H	Hour (24-hour clock) as a zero added decimal number.	00, 01, …, 23
%-H	Hour (24-hour clock) as a decimal number.	0, 1, …, 23
%I	Hour (12-hour clock) as a zero added decimal number.	01, 02, …, 12
%-I	Hour (12-hour clock) as a decimal number.	1, 2, … 12
%p	Locale’s AM or PM.	AM, PM
%M	Minute as a zero added decimal number.	00, 01, …, 59
%-M	Minute as a decimal number.	0, 1, …, 59
%S	Second as a zero added decimal number.	00, 01, …, 59
%-S	Second as a decimal number.	0, 1, …, 59
%f	Microsecond as a decimal number, zero added on the left.	000000 - 999999
%z	UTC offset in the form +HHMM or -HHMM.
%Z	Time zone name.
%j	Day of the year as a zero added decimal number.	001, 002, …, 366
%-j	Day of the year as a decimal number.	1, 2, …, 366
%U	Week 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
%W	Week 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：

# 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)

輸出：

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

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注：本文由純淨天空篩選整理自iamvineettiwari012大神的英文原創作品 Python strftime() function。非經特殊聲明，原始代碼版權歸原作者所有，本譯文未經允許或授權，請勿轉載或複製。