Python日期格式化常用的一些格式化占位符

%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

%% Percent sign

%f Millisecond

注：Python不支持%z, %Z等時區的格式占位符

字符串->日期格式

from datetime import datetime

tString = '1990-7-18-23-11-20'

format = '%Y-%m-%d-%H-%M-%S'

t = datetime.strptime(tString, format)

日期格式->字符串

from datetime import datetime

t = datetime.now()

format = '%Y-%m-%d-%H-%M-%S'

tString = t.strftime(format)

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