如何在文本文件中聲明一行作爲變量？

Question

例如，我打開了一個文本文件，發現用戶想要「購買」的產品。該產品上市的一個記事本的文本文件，與產品名稱，然後一個新的生產線，則產品的成本，例如

radiators 
0.50 
fridge 
0.50 

這是我迄今所做的：

product = input("What product would you like?") 
userfile = open ("products.txt","r") 
    lines = userfile.readlines() 
    for i in range(0, len(lines)): 
     line = lines[i] 
     if product in (line): 
      found = True 
      print("Found " + line) 
      print("This product is " + lines[i+1]) 
      print("This product costs " +lines[i+2]) 

我需要聲明lines[i+2]作爲一個變量，所以我可以把它乘以一個整數。有沒有辦法可以做到這一點？

Answer 1

嘗試了這一點：（？這是什麼意思連）

產品=輸入（「？你喜歡什麼產品」）

userfile = open ("products.txt","r") 
lines = userfile.readlines() 

for line in lines: 
    line = line.rstrip('\n') 
    if product in line: 
     found = True 
     print("Found " + line) 
     print("This product is " + lines[i+1]) 
     print("This product costs " + int(lines[i+2]))