我的代碼中的名稱錯誤

Question

嘿，我有一個非常簡單的問題，但是我希望修復它的所有地方似乎都不起作用。所以對於學校我們必須做到這一點，我們將用戶輸入保存到excel文件中，並在其中執行Mylist.append（電話）時出現錯誤，說明電話未定義。任何想法如何解決這個問題？

#Zacharriah Task 3 
import csv 
from IPhone import* 
from Android import* 
import time 

def start(): 
    print('Hello Welcome to the Phone Trouble-Shooter') 
    time.sleep(2) 
    phone = input('Please input what brand of phone you have') 
    if "iphone" in phone: 
     print('Your phone has been identified as an Iphone') 
    elif "android" in phone: 
     print('Your phone has been identifies as an Android') 


file = open("Excel_Task_3.csv", "w", newline = "") 
fileWrite = csv.writer(file,delimiter = ",") 
Mylist = [] 

Mylist.append(phone) 

fileWriter.writerow(Mylist) 

file.close() 

Answer 1

如果代碼與發佈完全相同，那麼phone確實沒有在您需要的地方定義。它在功能的範圍定義，但在室外使用 - 所以定義有沒有phone變量：

def start(): 
    # defined in the function's scope 
    phone = input('Please input what brand of phone you have') 
    # rest of code 


file = open("Excel_Task_3.csv", "w", newline = "") 
fileWrite = csv.writer(file,delimiter = ",") 
Mylist = [] 
# Used outside of the function's scope - it is unrecognized here 
Mylist.append(phone) 

你可以做的是從start返回一個值，然後使用它。喜歡的東西：

def start(): 
    phone = input('Please input what brand of phone you have') 
    # rest of code 
    return phone 

# rest of code 
Mylist = [] 
Mylist.append(start()) 

讀Short Description of Python Scoping Rules

Answer 2

phone不是start()功能之外定義。

這裏：Mylist.append(phone)

你應該修復它。

可選的解決辦法：

def start(): 
    print('Hello Welcome to the Phone Trouble-Shooter') 
    time.sleep(2) 
    phone = input('Please input what brand of phone you have') 
    if "iphone" in phone: 
     print('Your phone has been identified as an Iphone') 
    elif "android" in phone: 
     print('Your phone has been identifies as an Android') 
    return phone # Add this. 


file = open("Excel_Task_3.csv", "w", newline = "") 
fileWrite = csv.writer(file,delimiter = ",") 
Mylist = [] 
phone = start() # Add this. 
Mylist.append(phone) 

fileWriter.writerow(Mylist) 

file.close()