datetime

迈不过友情╰ 2021-09-30 13:58 268阅读 0赞

>>> import datetime
    >>> datetime.datetime.now()
    datetime.datetime(2017, 9, 30, 9, 6, 45, 542000)
    >>> from datetime import datetime
    >>> now=datetime.now()
    >>> now
    datetime.datetime(2017, 9, 30, 9, 6, 59, 310000)
    >>> 
    KeyboardInterrupt
    >>> utcnow=datetime.utcnow()
    >>>  utcnow
     
    SyntaxError: unexpected indent
    >>> 
    KeyboardInterrupt
    >>> utcnow
    datetime.datetime(2017, 9, 30, 1, 7, 21, 933000)
    >>> now.month
    9
    >>> now.year
    2017
    >>> d=datetime(2014,2,1)
    >>> d
    datetime.datetime(2014, 2, 1, 0, 0)
    >>> d.isoformat()
    '2014-02-01T00:00:00'
    >>> d.isoweekday()
    6
    >>> 
    KeyboardInterrupt
    >>> s=datetime.strptime('2017/9/30','%Y/%m/%d')
    >>> s
    datetime.datetime(2017, 9, 30, 0, 0)
    >>> datetime.strptime('2017年9月30日星期六','%Y年%m月%d日星期六')
    datetime.datetime(2017, 9, 30, 0, 0)
    >>> datetime.strptime('2017年9月30日星期六8时42分24秒','%Y年%m月%d日星期六%H时%M分%S秒')
    datetime.datetime(2017, 9, 30, 8, 42, 24)
    >>> datetime.strptime('9/30/2017','%m/%d/%Y')
    datetime.datetime(2017, 9, 30, 0, 0)
    >>> datetime.strptime('9/30/2017 8:42:50','%m/%d/%Y %H:%M:%S')
    datetime.datetime(2017, 9, 30, 8, 42, 50)
    >>>

*   *  将以下datetime类型转换成字符串：
        
         *  2017年9月28日星期4,10时3分43秒  
            Saturday, September 30, 2017  
            9/30/2017 9:22:17 AM  
            September 30, 2017

![复制代码][copycode.gif]

from datetime import datetime
    f1=datetime(2017,9,28,10,3,43)
    print(f1.strftime('%Y年%m月%d日%A%H时%M分%S秒'))
    
    f2=datetime(2017,9,30)
    print(f2.strftime('%A,%B %d,%Y'))
    
    f3=datetime(2017,9,30,9,22,17)
    print(f3.strftime('%m/%d/%Y %I:%M:%S %p'))
    
    print(f2.strftime('%B %d,%Y'))

![复制代码][copycode.gif]

![1232329-20171001151630747-207559470.png][]

*   *  用datetime类型的变量输出以下字符串：
        
         *  今天是2017年9月30日  
            今天是这周的第？天   
            今天是今年的第？天   
            今周是今年的第？周   
            今天是当月的第？天

![复制代码][copycode.gif]

from datetime import datetime
    now =datetime.now()
    print(now.strftime('今天是%Y年%m月%d日'))
    print(now.strftime('今天是这周的第%w天'))
    print(now.strftime('今天是今年的第%j天'))
    print(now.strftime('今周是今年的第%W周'))
    print(now.strftime('今天是当月的第%d天'))

![复制代码][copycode.gif]

![1232329-20171001151722450-1638398048.png][]

转载于:https://www.cnblogs.com/zhangmuqing/p/7613709.html

[copycode.gif]: /images/20210724/696d1cfea534493b96b90eb8d0b9f9c3.png
[1232329-20171001151630747-207559470.png]: /images/20210724/374cfaae0e8a4879b86d14ed06f4bbf7.png
[1232329-20171001151722450-1638398048.png]: /images/20210724/1b1e64b37f3f4ead9cc9fcf6cddf2dba.png