Python开发【内置模块篇】datetime

最新推荐文章于 2025-09-03 09:15:55 发布

转载最新推荐文章于 2025-09-03 09:15:55 发布 · 60 阅读

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原文链接：http://www.cnblogs.com/tangkaishou/p/10198632.html

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本文详细介绍了Python中日期和时间的处理方法，包括获取当前日期时间、创建指定日期时间、日期时间与timestamp的转换、字符串与datetime的转换，以及datetime的加减运算。通过实例演示了如何使用datetime模块进行各种日期时间操作。

获取当前日期和时间

1 >>> from datetime import datetime
2 >>> now = datetime.now()
3 >>> now
4 datetime.datetime(2018, 12, 30, 9, 30, 2, 734917)
5 >>> print(now)
6 2018-12-30 09:30:02.734917

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获取指定日期和时间

1 >>> from datetime import datetime
2 >>> dt = datetime(2015, 4, 19, 12, 20) # 用指定日期时间创建datetime
3 >>> print(dt)
4 2015-04-19 12:20:00

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datetime转换为timestamp

>>> from datetime import datetime
>>> dt = datetime(2015, 4, 19, 12, 20) # 用指定日期时间创建datetime
>>> dt.timestamp() # 把datetime转换为timestamp
1429417200.0

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timestamp转换为datetime

>>> from datetime import datetime
>>> t = 1429417200.0
>>> print(datetime.fromtimestamp(t))
2015-04-19 12:20:00

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str转换为datetime

>>> from datetime import datetime
>>> cday = datetime.strptime('2015-6-1 18:19:59', '%Y-%m-%d %H:%M:%S')
>>> print(cday)
2015-06-01 18:19:59

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datetime转换为str

>>> from datetime import datetime
>>> now = datetime.now()
>>> print(now.strftime('%a, %b %d %H:%M'))
Mon, May 05 16:28

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datetime加减

>>> from datetime import datetime, timedelta
>>> now = datetime.now()
>>> now
datetime.datetime(2015, 5, 18, 16, 57, 3, 540997)
>>> now + timedelta(hours=10)
datetime.datetime(2015, 5, 19, 2, 57, 3, 540997)
>>> now - timedelta(days=1)
datetime.datetime(2015, 5, 17, 16, 57, 3, 540997)
>>> now + timedelta(days=2, hours=12)
datetime.datetime(2015, 5, 21, 4, 57, 3, 540997)