检查项目在一个列表到另一个列表中的位置

Question

I am trying to make a trivia game, the only problem is I am having a hard time checking for the right answer. Here is my code for one of the questions

Question2 = random.choice(mylist)
print (Question2)
Userinput = input()
if(Question2.position == Question2answer.position):
    print('Yes, that is correct!')
else:
    print('Sorry, wrong answer')
mylist.remove(Question2)

I am trying to check if what the user put for question 2 was the answer to question 2 and not 4 by checking the positions in the list.

Answer 1

The easy solution is to use the right data type for the job.

For example, if your mylist were a list of (question, answer) pairs, instead of having two separate lists;

Question2, Answer2 = random.choice(mylist)
print(Question2)
Userinput = input()
if Userinput == Answer2:
    print('Yes, that is correct!')
else:
    print('Sorry, wrong answer')
mylist.remove((Question2, Answer2))

---

Or, alternatively, with a dictionary instead of a list:

Question2 = random.choice(mydict)
print(Question2)
Userinput = input()
if Userinput == mydict[Question2]:
    print('Yes, that is correct!')
else:
    print('Sorry, wrong answer')
del mylist[Question2]

Why is a dict better? Well, for one thing, with a list, you have to repeatedly search through the list to find the value you want—eg, mylist.remove starts at the beginning and compares each element to your value until it finds the right one. Besides being slow, and overly complicated, this does the wrong thing if you can ever have duplicate values (eg, try a = [1, 2, 3, 1] , then value = a[0] , then a.remove(value) and see what happens…).

---

But if you can't change the data structures, you can always use zip to zip up a pair of separate lists into a single list of pairs on the fly:

Question2, Answer2 = random.choice(zip(mylist, myanswers))
print(Question2)
Userinput = input()
if Userinput == Answer2:
    print('Yes, that is correct!')
else:
    print('Sorry, wrong answer')
mylist.remove(Question2)
myanswers.remove(Answer2)

Answer 2

You could use namedtuple as data container.

from collections import namedtuple
import random


Question = namedtuple('Question', ['question', 'answer'])
questions = [
    Question('Question 1', 'Answer 1'),
    Question('Question 2', 'Secret'),
    Question('Question 3', '3'),
]


q = random.choice(questions)
print("%s ?" % q.question)
user_input = raw_input().strip()


if(q.answer == user_input):
    print('Yes, that is correct!')
else:
    print('Sorry, wrong answer')

questions.remove(q)