RNG 应该忽略已经给出的数字 [Python]

Question

我正在使用随机数生成器从列表中随机选择一个问题，如果该问题已被回答，它应该跳过并重新滚动，直到它得到一个尚未给出的数字。

它一直有效，直到选项变得太有限。它会滚动〜4次。如果它仍然没有以前没有给出的数字，它会给出一个“索引超出范围”的错误。

示例：

from random import randint
counter = 0 # Max value, count the amount of questions in the list
done = [] # Already been rolled, ignore these values
list = open('questions.txt').readlines()

for l in list:
    counter +=1

try:
   # While there are less values in <done> than <counter>, roll and add to list
   while len(done) < counter:
       question = randint(1,counter)
       while question in done:
           print('Skipped [%i]' % question) # Check if ignored
           question = randint(1,counter) # Reroll
       else:
           # Add to list so it knows the question has already been asked
           done.append(question) # Add to list with given values
   else:
       print('Finished!\n')
except Exception as e:
   print(e) # Show error if any

我不知道我做错了什么，请帮忙。

谢谢:)

Answer 1

解决方案可能更简单，您实际上不需要计数器。

假设您有一个问题列表：

import random
questions = ['how are you ?', 'happy now ?', 'Another question ?']

然后您将打印其中一个问题：

question = random.choice(foo)
print question

然后从列表中删除它：

# del questions[questions.index(question)]
questions.remove(question)

给你！ ;)