Python 如何将字符串转换为时间日期 datetime 格式

2023-09-04 01:09| 来源: 网络整理| 查看: 265

datetime.strptime() 将字符串转换为 datetime datetime.strptime() 举例

本教程来介绍 Python 如何将字符串 string 转换为 datetime 对象，随后列举出来代码例子来实现流行的时间格式的转化。

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다이어트 음식 27가지, 많이 먹어도 살 안쪄요! datetime.strptime() 将字符串转换为 datetime

在以前的教程中，我们介绍了使用 datetime.strftime() 方法将 datetime 转化为字符串。这里我们将用 datetime.strptime() 方法来实现逆转换。两种方法中的差别 f 和 p 分别对应着 format（格式）和 parse（解析）。

datetime.strptime() 按照给定的 datetime 格式来解析字符串，解析成功的话，返回 datetime 对象。

下面的例子是 datetime.strptime() 的简单使用例子。

from datetime import datetime datetime.strptime("2018-01-31", "%Y-%m-%d")

它的返回结果是，

datetime.datetime(2018, 1, 31, 0, 0)

The directives of the string format codes are listed here for your reference

Directive Meaning Example %a Weekday as locale’s abbreviated name. Sun, Mon, …, Sat (en_US);So, Mo, …, Sa (de_DE) %A Weekday as locale’s full name. Sunday, Monday, …, Saturday (en_US);Sonntag, Montag, …, Samstag (de_DE) %w Weekday as a decimal number, where 0 is Sunday and 6 is Saturday. 0, 1, …, 6 %d Day of the month as a zero-padded decimal number. 01, 02, …, 31 %b Month as locale’s abbreviated name. Jan, Feb, …, Dec (en_US);Jan, Feb, …, Dez (de_DE) %B Month as locale’s full name. January, February, …, December (en_US);Januar, Februar, …, Dezember (de_DE) %m Month as a zero-padded decimal number. 01, 02, …, 12 %y Year without century as a zero-padded decimal number. 00, 01, …, 99 %Y Year with century as a decimal number. 0001, 0002, …, 2013, 2014, …, 9998, 9999 %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 %p Locale’s equivalent of either AM or PM. AM, PM (en_US);am, pm (de_DE) %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 %z UTC offset in the form ±HHMM[SS] (empty string if the object is naive). (empty), +0000, -0400, +1030 %Z Time zone name (empty string if the object is naive). (empty), UTC, EST, CST %j Day of the year as a zero-padded decimal number. 001, 002, …, 366 %U Week number of the year (Sunday as the first day of the week) as a zero padded decimal number. 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) as a decimal number. All days in a new year preceding the first Monday are considered to be in week 0. 00, 01, …, 53 %c Locale’s appropriate date and time representation. Tue Aug 16 21:30:00 1988 (en_US);Di 16 Aug 21:30:00 1988 (de_DE) %x Locale’s appropriate date representation. 08/16/88 (None);08/16/1988 (en_US);16.08.1988 (de_DE) %X Locale’s appropriate time representation. 21:30:00 (en_US);21:30:00 (de_DE) %% A literal '%' character. % datetime.strptime() 举例 7-May-2013 格式 from datetime import datetime dateString = "7-May-2018" dateFormatter = "%u-%b-%Y" datetime.strptime(dateString, dateFormatter)

输出：

datetime.datetime(2013, 5, 1, 0, 0) 31/12/2018 格式 from datetime import datetime dateString = "31/12/2013" dateFormatter = "%d/%m/%Y" datetime.strptime(dateString, dateFormatter)

输出：

datetime.datetime(2013, 12, 31, 0, 0) Mon, July 16 2018 格式 from datetime import datetime dateString = "31/12/2013" dateFormatter = "%d/%m/%Y" datetime.strptime(dateString, dateFormatter)

输出：

datetime.datetime(2018, 7, 16, 0, 0) Monday, July 16, 2018 20:01:56 格式 from datetime import datetime dateString = "Monday, July 16, 2018 20:01:56" dateFormatter = "%A, %B %d, %Y %H:%M:%S" datetime.strptime(dateString, dateFormatter)

输出：

datetime.datetime(2018, 7, 16, 20, 1, 56)

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