Python 入门教程 4 ---- Date and Time

    1 介绍得到当前的时间datetime.now()

    2 练习

       1 设置变量now的值为datetime.now()

       2 打印now的值

[python]  

<span style="font-size:18px">from datetime import datetime  

now = datetime.now()  

print now</span>  

 

 第二节

     1 介绍从datetime.now得到的信息中提取出year,month等

     2 练习: 从datetime.now中得到的信息中提取出year,month,day

[python]  

<span style="font-size:18px">from datetime import datetime  

now = datetime.now()  

  

print now.month  

print now.day  

print now.year</span>  

 

 第三节

    1 介绍把输出日期的格式转化为mm//dd//yyyy，我们利用的是+来转化

    2 练习：打印当前的日期的格式为mm//dd//yyyy

[python]  

<span style="font-size:18px">from datetime import datetime  

now = datetime.now()  

  

print str(now.month)+"/"+str(now.day)+"/"+str(now.year)</span>  

 

 第四节

    1 介绍把输出的时间格式化为hh:mm:ss

    2 练习：打印当前的时间的格式为hh:mm:ss

[python]  

<span style="font-size:18px">from datetime import datetime  

now = datetime.now()  

  

print str(now.hour)+":"+str(now.minute)+":"+str(now.second)</span>  

 

 第五节

    1 练习：把日期和时间两个连接起来输出

[python]  

<span style="font-size:18px">from datetime import datetime  

now = datetime.now()  

  

print str(now.month) + "/" + str(now.day) + "/" + str(now.year) + " "\  

+str(now.hour) + ":" + str(now.minute) + ":" + str(now.second)</span>