如果 "i" 被定义为一个整数，它如何知道 question==answers 与否？

Question

这个程序是实用的，我的问题更多是出于好奇和教育。如果我将"i"定义为"answers"长度范围内的整数，它如何知道用户输入的是否等于原始字符串？

示例：（#first 迭代）A、B、C 或 D？（#我回答）B （#answers[i]==1，但程序知道它也等于 B 并验证第一个输入是否正确。如果 "i" 定义为，它如何知道第一个 answers[i] 是 B整数？

# List of question answers
answers = ['B', 'D', 'A', 'A', 'C', 'A', 'B', 'A', 'C', 'D']

# List of user responses
response = []

# List of questions answered correctly
correct = []

# Number correctly answered
numCor = 0

# Number incorrectly answered
numIn = 0

# For every question answer, add user-reponse to response list
for i in range(len(answers)):
    question = input('A, B, C, or D: ')
    response.append(question)

    # If the user-response is equal to the question answer /
    # add 1 to correctly answered and add question-number to correct list
    if question == answers[i]:
        numCor += 1
        correct.append(i + 1)

    # If user-response does not match question answer /
    # add 1 to incorrectly answered
    else:
        numIn += 1

# Print correctly/incorrectly answered /
# and question-numbers answered correctly
print('You got', numCor, 'questions correct.')
print('You got', numIn, 'questions incorrect.')
print('Correct Questions:', correct)

Answer 1

answers[i] 表示您在 answers 数组中查找第 i 个元素，并获得存储在那里的值（在您的例子中是一个字符串）。

如果您在第一次迭代中，i 将为 0。

answers[0] 然后会给你 answers 中索引 0 处存储的值，即字符串 'B'

如果用户输入 B ，你的比较：

if question == answers[i]:

与

相同

if 'B' == 'B':

如果 "i" 被定义为一个整数，它如何知道 question==answers 与否？

If "i" is defined as an integer, how does it know if question==answers or not?

python

list

python-3.x

python-3.7