PythonDatetime.date类的isoformat()函数

Isoformat()函数用于以ISO 8601格式返回对应时区的日期、时间和 UTC 偏移量的字符串。

标准 ISO 8601 格式是关于公历的日期格式。此格式规定日历日期需要使用 4 位年份后跟两位数月份和两位数日期来表示。即，YYYY-MM-DD。示例：2020-01-01。

Syntax: isoformat(sep=’T’, timespec=’auto’)

Parameters: This function accepts two parameters which are illustrated below:

• sep: It is the separator character that is to be printed between the date and time fields. It is an Optional Parameter having default value of “T”.
• timespec: It is the format specifier for the timespec. It is also an Optional Parameter with a dfault value of “auto”. 

Return values: This function returns the date value of a Python DateTime.date object in ISO 8601 format.

示例 1：在下面的示例中，isoformat()函数在今天的日期被调用，它以 ISO 8601 格式返回相同的今天的日期字符串。

Python3

# Python3 code to demonstrate
# Getting date values in ISO 8601 format
  
# importing datetime and time module
import datetime
import time
          
# Getting today's date 
todays_Date = datetime.date.fromtimestamp(time.time());
  
# Calling the isoformat() function over the
# today's date
date_in_ISOFormat = todays_Date.isoformat();
  
# Printing Today's date in ISO format
print("Today's date in ISO Format: %s"%date_in_ISOFormat);

输出：

Today's date in ISO Format: 2021-07-27

示例 2：在下面的示例中，isoformat()函数在今天的日期和时间被调用，它以 ISO 8601 格式返回相同的今天的日期和时间字符串。

蟒蛇3

# Python3 code to demonstrate
# Getting date and time values 
# in ISO 8601 format
  
# importing datetime and time module
import datetime
import time
      
# Getting today's date and time
todays_Date = datetime.datetime.now(); 
  
# Calling the isoformat() function over the
# today's date and time
DateTime_in_ISOFormat = todays_Date.isoformat();
  
# Printing Today's date and time in ISO format
print("Today's date and time in ISO Format: %s"%DateTime_in_ISOFormat);

输出：

Today’s date and time in ISO Format: 2021-07-27T16:02:08.070557

示例 3：在下面的示例中，isoformat()函数采用了两个参数，一个是分隔字符，例如“#”，另一个参数是特定时间的格式说明符。此处使用的时间特定参数的不同值已在上述参数部分中说明。

蟒蛇3

# Python3 code to demonstrate
# Getting date and time values 
# in ISO 8601 format
  
# importing datetime module
import datetime
      
# Getting today's date and time
DateTime_in_ISOFormat = datetime.datetime.now(); 
  
# Printing Today's date and time in ISO format of
# auto value for the format specifier
print(DateTime_in_ISOFormat.isoformat("#", "auto"))
  
# Printing Today's date and
# time format specifier as hours
print(DateTime_in_ISOFormat.isoformat("#", "hours"))
  
# Printing Today's date and
# time format specifier as minutes
print(DateTime_in_ISOFormat.isoformat("#", "minutes"))
  
# Printing Today's date and time
# format specifier as seconds
print(DateTime_in_ISOFormat.isoformat("#", "seconds"))
  
# Printing Today's date and time
# format specifier as milliseconds
print(DateTime_in_ISOFormat.isoformat("#", "milliseconds"))
  
# Printing Today's date and time
# format specifier as microseconds
print(DateTime_in_ISOFormat.isoformat("#", "microseconds"))

输出：

2021-07-27#16:01:12.090202
2021-07-27#16
2021-07-27#16:01
2021-07-27#16:01:12
2021-07-27#16:01:12.090
2021-07-27#16:01:12.090202