以前没有深入考虑过raw_input与input函数的区别，所以一直比较困惑，今天测试之后，有了较为深入了解，记录如下
>>> user = raw_input(“Enter your name:”)
Enter your name:scr
>>> user
‘scr’
>>> user = raw_input(“Enter your name:”)
Enter your name:123
>>> user
‘123’
>>> user = input(“Enter your name,please!”)
Enter your name,please!4
>>> user
4
>>> user = input(“Enter your name,please!”)
Enter your name,please!”scr”
>>> user
‘scr’
>>> user = input(“Enter your name,please!”)
Enter your name,please!scr
Traceback (most recent call last):
File “<pyshell#67>”, line 1, in <module>
user = input(“Enter your name,please!”)
File “<string>”, line 1, in <module>
NameError: name ‘scr’ is not defined
>>>
总结：raw_input更符合用户输入的习惯，把任何用户输入都转换成字符串存储，在需要其它类型的数据时，调用相应的函数进行转换
input用户输入什么就存储什么，所以用户输入必须符合python语法要求，否则会出错，例如
>>> user = input(“Enter your name,please!”)
Enter your name,please!scr
Traceback (most recent call last):
File “<pyshell#67>”, line 1, in <module>
user = input(“Enter your name,please!”)
File “<string>”, line 1, in <module>
NameError: name ‘scr’ is not defined
>>>