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。
Directive | Meaning | Output Format |
---|---|---|
%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