备注:

1、在python2.x中raw_input( )和input( ),两个函数都存在,其中区别为

raw_input( )---将所有输入作为字符串看待,返回字符串类型

input( )-----只能接收“数字”的输入,在对待纯数字输入时具有自己的特性,它返回所输入的数字的类型( int, float )

 

2、在python3.x中raw_input( )和input( )进行了整合,去除了raw_input( ),仅保留了input( )函数,其接收任意任性输入,将所有输入默认为字符串处理,并返回字符串类型。

Python 2.3.4 (#1, Feb  2 2005, 11:44:13) 
[GCC 3.4.3 20041212 (Red Hat 3.4.3-9.EL4)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> user=raw_input("please input:")       
please input:wei                          #  raw_input 输入  字符串  成功
>>> user
'wei'
>>> user=input("please input:")          
please input:123                          #  input 输入  数字  成功(返回的是数字)
>>> user
123
>>> user=raw_input("please input:")
please input:111 			  #  raw_input 输入  数字  成功(返回的还是当成字符串)
>>> user
'111'
>>> user=input("please input:")
please input:wei                          #  input  输入字符串   失败
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
  File "<string>", line 0, in ?
NameError: name 'wei' is not defined
Python 3.2.3 (default, Apr 11 2012, 07:15:24) [MSC v.1500 32 bit (Intel)] on win  
32  
Type "help", "copyright", "credits" or "license" for more information.  
>>> user=raw_input("please input:")                 #没有了raw_input  
Traceback (most recent call last):  
  File "<stdin>", line 1, in <module>  
NameError: name 'raw_input' is not defined  
>>> user=input("please input:")  
please input:wei  
>>> user  
'wei'  
>>> user=input("please input:")                     #input的输出结果都是作为字符串  
please input:123  
>>> user  
'123'