Python date.strftime()方法 (Python date.strftime() Method)

date.strftime() method is used to manipulate objects of date class of module datetime.

date.strftime()方法用于操作模块datetime的日期类的对象。

It takes an instance of the class and returns a string representing the date, which is controlled by an explicit format string. Since this class has attributes related to dates only, format codes referring to hours, minutes, or seconds have 0 values.

它使用类的实例，并返回表示日期的字符串，该字符串由显式格式字符串控制。 由于此类仅具有与日期有关的属性，因此引用小时，分钟或秒的格式代码具有0值。

Module:

模块：

    import datetime

Class:

类：

    from datetime import date

Syntax:

句法：

    strftime(format)

Parameter(s):

参数：

• format - it is the string format code based on which string representation and formatting occurs. For example, %Y, %m, %d etc. are format codes. This method takes one or more format codes as an argument and returns a formatted string based on that.

  format-它是字符串格式代码，基于该代码的字符串表示形式和格式发生。 例如，％Y，％m，％d等是格式代码。 此方法将一个或多个格式代码作为参数，并根据该格式返回格式化的字符串。

Given below is a list of all the format codes available:

以下是所有可用格式代码的列表：

Please note all the codes which have time and timezone information, will have 0 values as date class only contains date attributes.

请注意，所有具有时间和时区信息的代码都将具有0值，因为日期类仅包含日期属性。

Return value:

返回值：

The return type of this method is a string converted according to the format code.

此方法的返回类型是根据格式代码转换的字符串。

Example:

例：

## Python program explaining the
## use of strftime() method in date class
from datetime import date
## Creating an instance
x = date.today()
c = x.strftime("%c")
print("Date representation using strftime:", c)
print()
##You can extract information using these methods
print("Abbreviated weekday name:", x.strftime("%a"))
print("Full weekday name:", x.strftime("%A"))
print("Weekday as a decimal number:", x.strftime("%w"))
print("Day of the month as a zero-padded decimal:", x.strftime("%d"))
print("Full month name:", x.strftime("%B"))
print("Month as a decimal number:", x.strftime("%-m"))
print("Year with century as a decimal number:", x.strftime("%Y"))
print("What day of the year is it?", x.strftime("%-j"))
print("What is the week number of this day?", x.strftime("%U"))
##or x.strftime("%W")
print()
## Different ways of representing the Date
## as a date string
print("Output 1:", x.strftime("%d %m %Y"))
print("Output 2:", x.strftime("%-d %-m %y, %H %M %S"))
## time values will be 0
print("Output 3:", x.strftime("%a %d %B %Y"))
print("Output 4:", x.strftime("%A, %Y %m %d, %H:%M:%S"))
print("Output 5:", x.strftime("%x"))
## You can create any combination of the date
## representation you want

Output

输出量

Date representation using strftime: Thu Apr 30 00:00:00 2020
Abbreviated weekday name: Thu
Full weekday name: Thursday
Weekday as a decimal number: 4
Day of the month as a zero-padded decimal: 30
Full month name: April
Month as a decimal number: 4
Year with century as a decimal number: 2020
What day of the year is it? 121
What is the week number of this day? 17
Output 1: 30 04 2020
Output 2: 30 4 20, 00 00 00
Output 3: Thu 30 April 2020
Output 4: Thursday, 2020 04 30, 00:00:00
Output 5: 04/30/20

翻译自: https://www.includehelp.com/python/date-strftime-method-with-example.aspx