Question

我正在尝试使用字典进行多项选择测验。我有一切，但它重复了之前被问过的同样的问题。我应该使用popitem，pop方法还是其他方法？

def German():
  import random
  a_q = {'Berlin':'What is east capital city for German?',
       'Bonn':'What is west capital city for German?',
       'Michael Schumacher':'What is a famous formula one driver?',
       'Albert Einstein':'He was one of the smartest one.'}
  keys = [x for x in random.sample(a_q, 3)]
  correctanswer = a_q[random.choice(keys)]
  correctanswer.popitems()
  print 'Question: ', correctanswer
  key1, key2, key3 = keys[0], keys[1], keys[2]
  print '\nA. %s \nB. %s \nC. %s' % (key1, key2, key3)
  A, B, C = a_q[key1], a_q[key2], a_q[key3]
  answer = raw_input('What is the right answer? ')

  if answer == "A":
        if A == correctanswer:
            print "That's correct!"
            German()
        else:
            print "I'm sorry, that is incorrect"
            print('')
            German()

  elif answer == "B":
        if B == correctanswer:
            print "That's correct!"
            German()

        else:
            print "I'm sorry, that is incorrect"
            German()

  elif answer == "C":
        if C == correctanswer:
            print "That's correct!"
            German()
        else:
            print "I'm sorry, that is incorrect"
            German()

  else:
        print "That is not a valid selection."

German()

Answer 1

gt

编辑：但您需要在功能

之外指定字典

Answer 2

不要一直调用函数使用循环，每次调用函数时都会重新创建dict，因此尝试删除任何东西都是毫无意义的：

def German():
    import random

    a_q = {'Berlin': 'What is east capital city for German?',
           'Bonn': 'What is west capital city for German?',
           'Michael Schumacher': 'What is a famous formula one driver?',
           'Albert Einstein': 'He was one of the smartest one.'}

    samp = random.sample(a_q.items(), 3)
    qs = [v for _, v in samp]
    ans = [k for k, _ in samp]
    A, B, C = ans
    d = {"A": A,"B": B,"C": C}
    for a, q in zip(ans, qs):
        print 'Question: {}'.format(q)
        print '\nA. {} \nB. {} \nC. {}' .format(A, B, C)
        answer = raw_input('What is the right answer? ')
        # check answer against a
        if d[answer] == a:
            print("That is correct")
        else:
            print("Sorry that is incorrect")

输出：

Question:  What is a famous formula one driver?

A. Michael Schumacher 
B. Berlin 
C. Albert Einstein
What is the right answer? A
That's correct!
Question:  What is east capital city for German?

A. Michael Schumacher 
B. Berlin 
C. Albert Einstein
What is the right answer? B
That's correct!
Question:  He was one of the smartest one.

A. Michael Schumacher 
B. Berlin 
C. Albert Einstein
What is the right answer? C
That's correct!

Answer 3

正如我在comments of your question中提到的，你的函数是递归的，所以即使你从字典中删除了一个元素，你也可以在调用函数时重新添加它。

要解决此问题，您可以使用以下代码行：

q = [x for x in random.sample(a_q, len(a_q))]

这会创建一个随机排序的问题列表，因此您可以在没有任何重复问题的情况下进行迭代。 无论您添加多少问题，这都会有效。

现在，对于答案，你可以使用这段代码：

c=random.sample(a_q, 3)
while c.count(q[i]) != 1:
    c=random.sample(a_q, 3)
random.shuffle(c)

这将创建一个包含3个答案的随机列表，其正确答案显示为q[i]。 while循环用于防止答案池中的任何重复答案。

如果你把它放在一起：

def German():
    import random
    a_q = {'Berlin':'What is east capital city for German?',
           'Bonn':'What is west capital city for German?',
           'Michael Schumacher':'What is a famous formula one driver?',
           'Albert Einstein':'He was one of the smartest one.',
           'The Berlin Wall':'What was the wall called that separated the country?',
           'Boris Becker':'He was a good tennis player he won two wimbildom titles?',
           '2006':'What year was the FIFA World Cup held in Germany?',
           '3':'How many world cups does Germany have?',
           'Yodeling':'What is one of the tradition in German?',
           '9 months':'How long does Zugspitze winter last for?'}

    q = [x for x in random.sample(a_q, len(a_q))] #create list of questions
    i=0 #start counter

    while i < len(q):                 #iterate through every question

        correctanswer = a_q[q[i]]     #define the correct answer
        print 'Question: ', correctanswer
        c=random.sample(a_q, 3)       
        while c.count(q[i]) != 1:
            c=random.sample(a_q, 3)   #get the answer pool
        key1, key2, key3 = c
        print '\nA. %s \nB. %s \nC. %s' % (key1, key2, key3)
        A, B, C = a_q[key1], a_q[key2], a_q[key3]
        answer = raw_input('What is the right answer? ')

        while answer not in 'ABCD':   #check for invalid inputs
             print "That is not a valid selection.\n"
             answer = raw_input('What is the right answer? ')

        if answer == 'A' and A  == correctanswer:
            print "That's correct!"
        elif answer == 'B' and B == correctanswer:
            print "That's correct!"          
        elif answer == 'C' and C == correctanswer:
            print "That's correct!"
        else:
            print "I'm sorry, that is incorrect"
        i+=1

German()

这将输出：

>>> 
Question:  How many world cups does Germany have?

A. Bonn 
B. Yodeling 
C. 3
What is the right answer? 3
That is not a valid selection.

What is the right answer? C
That's correct!
Question:  What is one of the tradition in German?

A. Yodeling 
B. Boris Becker 
C. The Berlin Wall
What is the right answer? A
That's correct!
Question:  What year was the FIFA World Cup held in Germany?

A. Bonn 
B. Yodeling 
C. 2006
What is the right answer? C
That's correct!
Question:  How long does Zugspitze winter last for?

A. Albert Einstein 
B. Bonn 
C. 9 months
What is the right answer? C
That's correct!
Question:  What is east capital city for German?

A. Berlin 
B. 9 months 
C. Boris Becker
What is the right answer? A
That's correct!
Question:  He was one of the smartest one.

A. Albert Einstein 
B. The Berlin Wall 
C. 2006
What is the right answer? A
That's correct!
Question:  What is west capital city for German?

A. Bonn 
B. Yodeling 
C. 9 months
What is the right answer? B
I'm sorry, that is incorrect
Question:  What is a famous formula one driver?

A. Michael Schumacher 
B. The Berlin Wall 
C. Yodeling
What is the right answer? A
That's correct!
Question:  He was a good tennis player he won two wimbildom titles?

A. Bonn 
B. Berlin 
C. Boris Becker
What is the right answer? C
That's correct!
Question:  What was the wall called that separated the country?

A. Boris Becker 
B. The Berlin Wall 
C. Michael Schumacher
What is the right answer? B
That's correct!

显示后删除字典中的字符串

3 个答案: