爲什麼我在程序的同時運行循環到無窮遠

Question

我的Python程序應該是一個模仿Craigslist網站論壇的帖子，上面寫着有一堆inputs.The主代碼的文本文件看起來像

filename = input() 
myFile = open(filename, "r") 
mssgBoard = [["bicycle"], ["microwave"], ["dresser"], ["truck"],["chicken"]] 
choice = "" 
while (choice != "4"): 
    print ("1. Insert an item.") 
    print ("2. Search an item.") 
    print ("3. Print the message board.") 
    print ("4. Quit.") 
    choice = myFile.readline() 
    if (choice == "1"): 
     userInput = "" 
     userInput1 = 0 
     print ("Enter the item type-b,m,d,t,c: ") 
     userInput = myFile.readline() 
     print ("Enter the item cost: ") 
     userInput1 = myFile.readline() 
     if userInput == "b": 
      mssgBoard[0].append(userInput1) 
     elif userInput == "m": 
      mssgBoard[1].append(userInput1) 
     elif userInput == "d": 
      mssgBoard[2].append(userInput1) 
     elif userInput == "t": 
      mssgBoard[3].append(userInput1) 
     elif userInput == "c": 
      mssgBoard[4].append(userInput1) 

和輸入是

1 
b 
50 
1 
m 
30 
3 
2 
m 
40 
3 
4 

Answer 1

您不是從您正在從文件中讀取的輸入中分割換行符。每一行在其末尾都有一個隱藏的\n。這是一個簡單的修復，只需添加.strip()

choice = myFile.readline().strip()