在python中input()和raw_input()函数均可以从终端输入，但二者存在一定区别，例如如下代码：

#!/usr/bin/python
# -*- coding: utf-8 -*-
# guess.py
import random

guessesTaken = 0

print ('Hello! what is your name')
#myName = raw_input()
myName = input()
number = random.randint(1, 23)
print ('well, ' + myName + ', i am thinking of a number between 1 and 23.')

while guessesTaken < 7:
    print ('Take a guess')
    guess = input()
    #guess = int(guess)

    guessesTaken = guessesTaken + 1

    if guess < number:
        print ('your guess is too low')
    if guess > number:
        print ('your guess is too high')
    if guess == number:
        break

if guess == number:
    print ('good job! you guess in %d guesses!' %guessesTaken)

if guess != number:
    print ('sorry! your guess is wrong')

在第10行中使用了input()函数，此时如果终端直接输入xxx，则会显示NameError: name 'xxx' is not defined的错误，如果输入"xxx"或'xxx'则可正确运行。

如果使用raw_input()函数，可直接输入xxx。

这两个函数的区别为如果直接键入数字，input()返回一个数值类型，比如int,float，而raw_input()则会返回字符串类型；如果键入非数字，则input()函数要求以字符串引用的形式输入，比如"xxx",而raw_input()可以直接输入为xxx，二者均返回字符串。