python日期操作
2015-12-11 11:34
393 查看
python日期操作用到库time, datetime
格式化字符串含义:
输出结果:
格式化字符串含义:
%a Abbreviated weekday name 本地化星期缩略格式 %A Full weekday name 本地化星期完整格式 %b Abbreviated month name 本地化月份缩略格式 %B Full month name 本地化月份完整格式 %c Date and time representation appropriate for locale 本地化日期与时间表示 %d Day of month as decimal number (01 - 31) 月份内日期索引 %H Hour in 24-hour format (00 - 23) 24小时索引 %I Hour in 12-hour format (01 - 12) 12小时索引 %j Day of year as decimal number (001 - 366) 年内日期索引 %m Month as decimal number (01 - 12) 月份索引 %M Minute as decimal number (00 - 59) 分钟索引 %p Current locale's A.M./P.M. indicator for 12-hour clock 本地化上午/下午指示符 %S Second as decimal number (00 - 59) 秒索引 %U Week of year as decimal number, with Sunday as first day of week (00 - 51) 年内星期索引, 以周日为一周开始 %w Weekday as decimal number (0 - 6; Sunday is 0) 周内星期索引,周日为0 %W Week of year as decimal number, with Monday as first day of week (00 - 51) 年内星期索引, 以周一为一周开始 %x Date representation for current locale 本地化日期表示 %X Time representation for current locale 本地化时间表示 %y Year without century, as decimal number (00 - 99) 世纪内年份索引, 即相当于两位年份表示 %Y Year with century, as decimal number 带世纪值年份索引 %z, %Z Time-zone name or abbreviation; no characters if time zone is unknown 时区名称或缩写, 未知时为空 %% Percent sign 百分号转义示例代码1(python 3):
# coding=utf-8 import time, datetime # strftime(string)函数用于返回格式化日期字符串 # 格式化当前日期 now = datetime.datetime.now().strftime('%b-%d-%y %H:%M:%S') print(now) # strptime(string, string)函数用于返回由特定格式解析得到的日期对象 nowObj = datetime.datetime.strptime('15-Sep-21 16:34', '%y-%b-%d %H:%M') print(nowObj) print(nowObj.strftime('%b-%d-%Y %H:%M'))输出结果:
Dec-11-15 11:33:23 2015-09-21 16:34:00 Sep-21-2015 16:34示例代码2
import time, datetime startDate = datetime.datetime.strptime('20150916', '%Y%m%d') endDate = datetime.datetime.strptime('20150921', '%Y%m%d') oneday=datetime.timedelta(days=1) while startDate != endDate: print(startDate.strftime('%Y%m%d')) startDate += oneday
输出结果:
20150917 20150918 20150919 20150920