如何使用变量的值而不是它的标识符？

Question

我正在编写一个程序来 output 输入特定水果的学名。 这是我的来源：

import time;

fruits={
    "apple":"Malus domestica",
    "banana":"Musa acuminata",
    "orange":"Citrus sinensis",
    "lychee":"Litchi chinensis",
};

fruit=input("Enter a fruit(either an apple, banana, orange, or lychee):");

if fruit in fruits:
    print("Your fruit's scientific name is "+fruits.fruit+"\n");
else:
    print("Sorry, the fruit you entered was not in the database");

但是当我在控制台中输入“橙色”作为输入时，编译器会抛出一条错误消息：

Traceback (most recent call last):
  File "<string>", line 13, in <module>
AttributeError: 'dict' object has no attribute 'fruit'
> 

有什么方法可以使用“fruit”的值而不是将其用作 dict 元素？

Answer 1

使用[] ：

print(f"Your fruit's scientific name is {fruits[fruit]}\n")

Answer 2

您应该从这里更新您的代码：

if fruit in fruits:
    print("Your fruit's scientific name is "+fruits.fruit+"\n");

对此：

if fruit in fruits:
    print("Your fruit's scientific name is "+fruits[fruit]+"\n");