在使用 Python 字典进行测验或测试时，可能会遇到一些常见的问题。以下是这些问题的描述及相应的解决方法：
1、问题背景
在Python中，我们经常会使用字典结构来创建测验程序，其中键是问题，值是答案。当用户回答问题时，程序会检查答案是否正确，并给出相应的反馈。然而，在使用字典结构创建测验程序时，我们可能会遇到一些问题，例如无法正确删除已回答的问题或无法跟踪用户答错的问题等。
2、解决方案
为了解决上述问题，我们可以使用以下方法：
- 在每次回答问题后，从字典中删除已回答的问题。
- 使用一个列表来跟踪用户答错的问题。
下面是一个使用上述方法实现的测验程序代码示例：
代码语言：javascript复制import random
def main():
capitals = {
"Washington": "Olympia",
"Oregon": "Salem",
"California": "Sacramento",
"Ohio": "Columbus",
"Nebraska": "Lincoln",
"Colorado": "Denver",
"Michigan": "Lansing",
"Massachusetts": "Boston",
"Florida": "Tallahassee",
"Texas": "Austin",
"Oklahoma": "Oklahoma City",
"Hawaii": "Honolulu",
"Alaska": "Juneau",
"Utah": "Salt Lake City",
"New Mexico": "Santa Fe",
"North Dakota": "Bismarck",
"South Dakota": "Pierre",
"West Virginia": "Charleston",
"Virginia": "Richmond",
"New Jersey": "Trenton",
"Minnesota": "Saint Paul",
"Illinois": "Springfield",
"Indiana": "Indianapolis",
"Kentucky": "Frankfort",
"Tennessee": "Nashville",
"Georgia": "Atlanta",
"Alabama": "Montgomery",
"Mississippi": "Jackson",
"North Carolina": "Raleigh",
"South Carolina": "Columbia",
"Maine": "Augusta",
"Vermont": "Montpelier",
"New Hampshire": "Concord",
"Connecticut": "Hartford",
"Rhode Island": "Providence",
"Wyoming": "Cheyenne",
"Montana": "Helena",
"Kansas": "Topeka",
"Iowa": "Des Moines",
"Pennsylvania": "Harrisburg",
"Maryland": "Annapolis",
"Missouri": "Jefferson City",
"Arizona": "Phoenix",
"Nevada": "Carson City",
"New York": "Albany",
"Wisconsin": "Madison",
"Delaware": "Dover",
"Idaho": "Boise",
"Arkansas": "Little Rock",
"Louisiana": "Baton Rouge",
}
wrong = []
print("STATE TESTn")
incorrect_answers = False
while len(capitals) > 0:
pick = random.choice(list(capitals.keys()))
correct_answer = capitals.get(pick)
print("What is the capital city of", pick, "?")
answer = input("Your answer: ")
if answer.lower() == correct_answer.lower():
print("That's Correct!n")
del capitals[pick]
else:
print("That's Incorrect.")
print("The correct answer is", correct_answer)
wrong.append(pick)
incorrect_answers = True
print("You missed", len(wrong), "states.n")
if incorrect_answers:
print("Here are the ones that you may want to brush up on:n")
for each in wrong:
print(each)
else:
print("Perfect!")
if __name__ == "__main__":
main()在这个代码示例中，我们使用了一个列表wrong来跟踪用户答错的问题，并在测验结束时打印出这些问题。同时，我们还使用了del语句来删除已回答的问题，以确保在下次循环中不会重复出现这些问题。
希望这个解决方法能够帮助您解决在Python中使用字典结构创建测验程序时遇到的问题。
通过了解和解决这些常见问题，可以更高效地使用 Python 字典进行测验或测试，从而避免不必要的错误和调试时间。
