Python：NameError name'[input]'未定義

Question

我正在嘗試製作一個簡單的小工具，用於將英寸轉換爲釐米，並堅持嘗試將用戶輸入（'y'或'n'）決定是否做另一次轉換或終止。下面是我做了什麼：

import time 

def intro(): 
    print "Welcome! This program will convert inches to centimeters for you.\n" 
    convert() 

def convert(): 
    input_cm = input(("Inches: ")) 
    inches_conv = input_cm * 2.54 
    print "Centimeters: %f\n" % inches_conv 
    time.sleep(3) 
    restart = str(input("Do you wish to make another conversion? [y]Yes or [n]no: ")) 
    if restart == 'y': 
     convert() 
    elif restart == 'n': 
     end_fast() 
    else: 
     print "I didn't quite understand that answer. Terminating." 
     end_slow() 

def end_fast(): 
    print "This program will close in 5 seconds." 
    time.sleep(5) 

def end_slow(): 
    print "This program will close in 30 seconds." 
    time.sleep(30) 

intro() 

，這導致：

Traceback (most recent call last): File "C:\Users\Sam\Programming\Python\the hard way\ex5.4.py", line 29, in intro() File "C:\Users\Sam\Programming\Python\the hard way\ex5.4.py", line 5, in intro convert() File "C:\Users\Sam\Programming\Python\the hard way\ex5.4.py", line 12, in convert restart = str(input("Do you wish to make another conversion? [y]Yes or [n]no?\n")) File "", line 1, in NameError: name 'y' is not defined

幫助表示讚賞。

Answer 1

，而不是input嘗試raw_input：

取代：

restart = str(input("Do you wish to make another conversion? [y]Yes or [n]no: ")) 

上：

restart = raw_input("Do you wish to make another conversion? [y]Yes or [n]no: ")