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  • Python的datetime

    Python的datetime

    总会用到日期格式化和字符串转成日期,贴点代码以供参考,其实API真的是很全的,可是又不知道具体的method...

    datetime.datetime.strftime(format_str):返回格式化后的日期字符串 记忆- strFormattime

    datetime.datetime.strptime(date_str,format_str):由字符串转为日期型 记忆- strParsetime

    格式化参数

    两个函数都涉及日期时间的格式化字符串,列举如下:
    %a Abbreviated weekday name
    %A Full weekday name
    %b Abbreviated month name
    %B Full month name
    %c Date and time representation appropriate for locale
    %d Day of month as decimal number(01 - 31)
    %H Hour in 24 - hour format(00 - 23)
    %I Hour in 12 - hour format(01 - 12)
    %j Day of year as decimal number(001 - 366)
    %m Month as decimal number(01 - 12)
    %M Minute as decimal number(00 - 59)
    %p Current locale's A.M. / P.M. indicator for 12 - hour clock
    %S Second as decimal number(00 - 59)
    %U Week of year as decimal number, with Sunday as first day of week(00 - 51)
    %w Weekday as decimal number(0 - 6 Sunday is 0)
    %W Week of year as decimal number, with Monday as first day of week(00 - 51)
    %x Date representation for current locale
    %X Time representation for current locale
    %y Year without century, as decimal number(00 - 99)
    %Y Year with century, as decimal number
    %z, % Z Time - zone name or abbreviation
    no characters if time zone is unknown
    % % Percent sign
    

    代码示例

    from datetime import datetime
    
    d = datetime.now()
    print(d)
    # 2016-05-11 17:37:32.318566
    print(d.strftime('%y-%m-%d'))
    # 16-05-11
    print(d.strftime('%Y-%m-%d'))
    # 2016-05-11
    print(d.strftime('%Y-%m-%d %H:%M:%S'))
    # 2016-05-11 17:37:32
    
    # 字符串转日期就是要告诉程序传入的字符串各部分代表什么
    datetime.strptime('2016-05-11 17:37:32', '%Y-%m-%d %H:%M:%S')
    
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  • 原文地址:https://www.cnblogs.com/wancy86/p/python_datetime.html
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