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localtime = time.strftime("%Y-%m-%d %H:%M:%S", time.localtime())

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strftime格式化：

%a    Locale’s abbreviated weekday name.   #英文星期的縮寫  
%A    Locale’s full weekday name.          #英文星期的全名
%b    Locale’s abbreviated month name.     #英文月份的縮寫 
%B    Locale’s full month name.     　　　 　#英文月份的全名
%c    Locale’s appropriate date and
 
 time representation.     
%d    Day of the month as a decimal number [01,31].        #每日 
%H    Hour (24-hour clock) as a decimal number [00,23].    #小時  
%I    Hour (12-hour clock) as a decimal number [01,12].     
%j    Day of the year as a decimal number [001,366].     
%m    Month as a decimal number [01,12].     　　　　　　　　 #數字的月份
 
%M    Minute as a decimal number [00,59].     　　　　　　　　#數字分鐘
%p    Locale’s equivalent of either AM or PM.    (1)
%S    Second as a decimal number [00,61].    (2)            #數字秒
%U    Week number of the year (Sunday as the first day of the week) as a decimal number [00,53]. All days in a new year preceding the first Sunday are considered to be in
 
 week 0.    (3)
%w    Weekday as a decimal number [0(Sunday),6].     
%W    Week number of the year (Monday as the first day of the week) as a decimal number [00,53]. All days in a new year preceding the first Monday are considered to be in week 0.    (3)
%x    Locale’s appropriate date representation.     
%X    Locale’s appropriate time representation.     
%y    Year without century as a decimal number [00,99].     
%Y    Year with century as a decimal number.     　　　　　　 #年份
%Z    Time zone name (no characters if no time zone exists).     
%%    A literal ‘%‘ character.

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常用的：

date_fmt=‘%a, %d %b %Y %H:%M:%S‘
time.strftime("%a, %d %b %Y %H:%M:%S‘", time.localtime())
time.strftime("%Y-%m-%d %H:%M:%S", time.localtime())

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Python #time