无法检查键是否属于值

Question

下面的 short() 函数不起作用。 full() 工作得很好。有没有解决方案，或者我是否必须创建另一个交换键和值的目录？

import random

elements = {"Sc":"Scandium",
           "Ti":"Titanium",
           "V":"Vanadium",
           "Cr":"Chromium",
           "Mn":"Manganum",
           "Fe":"Ferrum"}


def short():
    question = random.choice(list(elements.values()))
    print(question)
    answer = input("What is the short name of this element?: ")
    if answer == elements[question]:
        print("Right")


def full():
    question = random.choice(list(elements.keys()))
    print(question)
    answer = input("What is the full name of this element?: ")
    if answer == elements[question]:
        print("Right")


mode = input("Do you want to guess the short or full name? (sh/fu): ").lower()

if mode == "sh":
    short()

elif mode == "fu":
    full()

Answer 1

我改变了主意。您不需要反向dict。

只是结构 short() 略有不同：

import random

elements = {"Sc":"Scandium",
           "Ti":"Titanium",
           "V":"Vanadium",
           "Cr":"Chromium",
           "Mn":"Manganum",
           "Fe":"Ferrum"}

def short():
    question = random.choice(list(elements.keys()))
    print(elements[question])
    answer = input("What is the short name of this element?: ")
    if answer == question:
        print("Right")

def full():
    question = random.choice(list(elements.keys()))
    print(question)
    answer = input("What is the full name of this element?: ")
    if answer == elements[question]:
        print("Right")

mode = input("Do you want to guess the short or full name? (sh/fu): ").lower()

if mode == "sh":
    short()

elif mode == "fu":
    full()

short() 现在像 full() 一样随机选择一个键，但用术语提出问题很容易在向前访问的长名称。