python，初学，小问题，求解

responses = {}
# 设置一个标志，指出调查是否继续
polling_active = True

while polling_active: 
    # 提示输入被调查者的名字和回答
    name = input("\nWhat is your name? ")
    response = input("Which mountain would you like to climb someday? ")
    
    # 将答卷存储在字典中
    responses[name] = response
    
    # 看看是否还有人要参与调查
    repeat = input("Would you like to let another person respond? (yes/ no) ")
    if repeat == 'no':
        polling_active = False

# 调查结束，显示结果
print("\n--- Poll Results ---")
for name, response in responses.items():
    print(name + " would like to climb " + response + ".")

书中的案例，在 #看看是否有人参与的 代码处输入非‘yes’or‘no’的回答，也会当成是’yes‘继续运行。

我希望能改成：

①用户输入非‘yes’or‘no’的回答时，程序可以提示用户‘您输入的格式不对，请重新输入。’

②让程序返回到responses[name] = response的后面继续提示用户输入‘yes’or‘no’（此处不可以打印调查结果）

改了很多次都不行，能力有限，希望各位可以帮忙。（尽量简单一些，）

谢谢

while循环就行了。好说。

while polling_active: 
    # 提示输入被调查者的名字和回答
    name = input("\nWhat is your name? ")
    response = input("Which mountain would you like to climb someday? ")
    
    # 将答卷存储在字典中
    responses[name] = response
    
    # 看看是否还有人要参与调查
    while True:
        repeat = input("Would you like to let another person respond? (yes/ no) ")
        if repeat == 'no':
            polling_active = False
            break
        elif repeat == 'yes':
            break
        else:
            print("Wrong input format. do it again.")
            continue