如何在文本文件中声明一行作为变量？

Question

例如，我打开了一个文本文件，发现用户想要“购买”的产品。该产品上市的一个记事本的文本文件，与产品名称，然后一个新的生产线，则产品的成本，例如

radiators 
0.50 
fridge 
0.50 

这是我迄今所做的：

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]) 

我需要声明lines[i+2]作为一个变量，所以我可以把它乘以一个整数。有没有办法可以做到这一点？

Answer 1

尝试了这一点：（？这是什么意思连）

产品=输入（“？你喜欢什么产品”）

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]))