year = timedelta(days=365) ten_years = year *10 nine_years = ten_years - year
datetime1 = datetime2 +/- timedelta
timedelta = datetime1 - datetime2
d1 = datetime.datetime.strptime(‘2012-03-05 17:41:20‘, ‘%Y-%m-%d %H:%M:%S‘) d2 = datetime.datetime.strptime(‘2012-03-02 17:41:20‘, ‘%Y-%m-%d %H:%M:%S‘) delta = d1 - d2 print (delta.days) # 计算两个日期相差多少天
now = datetime.datetime.now() delta = datetime.timedelta(days=3) n_days = now + delta print n_days.strftime(‘%Y-%m-%d %H:%M:%S‘) # 输出今天的多少天后的日期
#coding=utf-8 import datetime now=datetime.datetime.now() print now #将日期转化为字符串 datetime => string print now.strftime(‘%Y-%m-%d %H:%M:%S‘) t_str = ‘2012-03-05 16:26:23‘ #将字符串转换为日期 string => datetime d=datetime.datetime.strptime(t_str,‘%Y-%m-%d %H:%M:%S‘) print d #在datetime模块中有timedelta类,这个类的对象用于表示一个时间间隔,比如两个日#期或者时间的差别。 #计算两个日期的间隔 d1 = datetime.datetime.strptime(‘2012-03-05 17:41:20‘, ‘%Y-%m-%d %H:%M:%S‘) d2 = datetime.datetime.strptime(‘2012-03-02 17:41:20‘, ‘%Y-%m-%d %H:%M:%S‘) delta = d1 - d2 print delta.days print delta #今天的n天后的日期。 now=datetime.datetime.now() delta=datetime.timedelta(days=3) n_days=now+delta print n_days.strftime(‘%Y-%m-%d %H:%M:%S‘)