使用时区将字符串转换为Python的日期时间

先决条件：日期时间模块

在本文中，我们将学习如何使用Python从时间字符串获取日期时间对象。

要将时间字符串转换为日期时间对象，使用 datetime 模块的 datetime.strptime()函数。此函数返回日期时间对象。

Syntax : datetime.strptime(date_string, format)

Parameters :

• date_string : Specified time string containing of which datetime object is required. **Required
• format : Abbreviation format of date_string

Returns : Returns the datetime object of given date_string

可以传递给 strptime() 的可接受格式列表：

Directive	Meaning	Output Format
%Y	Abbreviated weekday name.	Sun, Mon, …, Sat
%m	Month as a zero-padded decimal number.	01, 02, …, 12
%b	Month as locale’s abbreviated name.	Jan, Feb, …, Dec
%d	Day of the month as a zero-padded decimal number.	01, 02, …, 31
%H	Hour (24-hour clock) as a zero-padded decimal number.	00, 01, …, 23
%I	Hour (12-hour clock) as a zero-padded decimal number.	01, 02, …, 12
%M	Minute as a zero-padded decimal number.	00, 01, …, 59
%S	Second as a zero-padded decimal number.	00, 01, …, 59
%f	Microsecond as a decimal number, zero-padded on the left.	000000, 000001, …, 999999
%p	Locale’s equivalent of either AM or PM	AM, PM, am, pm
%z	UTC offset in the form ±HHMM	+0000, -0400, +0530

示例 1：将日期时间字符串转换为日期时间

Python3

# Python3 code to demonstrate
# Getting datetime object using a date_string
  
# importing datetime module
import datetime
  
# datestring for which datetime_obj required
date_string = '2021-09-01 15:27:05.004573 +0530'
print("string datetime: ")
print(date_string)
print("datestring class is :", type(date_string))
  
# using strptime() to get datetime object
datetime_obj = datetime.datetime.strptime(
    date_string, '%Y-%m-%d %H:%M:%S.%f %z')
  
print("converted to datetime:")
  
# Printing datetime
print(datetime_obj)
  
# Checking class of datetime_obj.
print("datetime_obj class is :", type(datetime_obj))

输出：

string datetime: 
2021-09-01 15:27:05.004573 +0530
datestring class is : 
converted to datetime:
2021-09-01 15:27:05.004573+05:30
datetime_obj class is : 

示例 2：将日期时间字符串转换为日期时间

蟒蛇3

# Python3 code to demonstrate
# Getting datetime object using a date_string
  
# importing datetime module
import datetime
  
# datestring for which datetime_obj required
date_string = '2021-09-01 15:27:05'
  
# using strptime() to get datetime object
datetime_obj = datetime.datetime.strptime(date_string, '%Y-%m-%d %H:%M:%S')
  
# Printing datetime
print(datetime_obj)

输出：

2021-09-01 15:27:05

在此示例中，从第一个示例中删除了微秒和时区部分，因此我们还需要从格式字符串删除微秒和时区缩写

示例 3：将日期时间字符串转换为日期时间

蟒蛇3

# Python3 code to demonstrate
# Getting datetime object using a date_string
  
# importing datetime module
import datetime
  
# datestring for which datetime_obj required
date_string = 'Sep 01 2021 03:27:05 PM'
  
# using strptime() to get datetime object
datetime_obj = datetime.datetime.strptime(date_string, '%b %d %Y %I:%M:%S %p')
  
# Printing datetime
print(datetime_obj)

输出：

2021-09-01 15:27:05