python的datetime库笔记

使用datetime库
from datetime import datetime

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例子：打印现在时刻的时间

from datetime import datetimenow=datetime.now()print now.yearprint now.monthprint now.day

通过string的学习我们知道可以按照特定格式输出时间：

print '%s-%s-%s' % (now.year, now.month, now.day)print "%s/%s/%s"%(now.year,now.month,now.day)print '%s:%s:%s'%(now.hour,now.minute,now.second)

可以输出：

2016-6-132016/6/1313:20:43