#首先創建一個待驗證用戶列表

#再創建一個用于存儲已驗證用戶的空列表
unconfirmed_users=['alice','brian','tom']
confirmed_users=[]


#驗證每個用戶,將每個經過驗證的元素都移到已驗證用戶列表中

#pop()函數每次從列表unconfirmed_users末尾刪除一個的用戶
#title() 方法返回"標題化"的字符串,單詞以大寫開始，其余字母均為小寫
#append() 方法用于在列表末尾添加新的對象


while unconfirmed_users:
    curent_user=unconfirmed_users.pop()
    print("Verifying user:"+curent_user.title())
    confirmed_users.append(curent_user)




#顯示所有已驗證的用戶
print("\nThe following users have been confirmed:")
for confirmed_user in confirmed_users:
    print(confirmed_user.title())

>>> 
================ RESTART: D:\python學習\7.3\confirmed_users.py ================
Verifying user:Tom
Verifying user:Brian
Verifying user:Alice

The following users have been confirmed:
Tom
Brian
Alice
>>> 

#刪除列表中所有包含特定值的元素
pets=['dog','cat','dog','goldfish','cat','rabbit','cat']

print(pets)

while 'cat' in pets:
    pets.remove('cat')

print()
print(pets)

====================== RESTART: D:/python學習/7.3/pets.py ======================
['dog', 'cat', 'dog', 'goldfish', 'cat', 'rabbit', 'cat']

['dog', 'dog', 'goldfish', 'rabbit']
>>> 

#使用用戶輸入來填充字典
#每次循環提示輸入被調查者的名字和回答，收集的數據存放在一個字典中

responses={}
polling_active=True

while polling_active:
    
    name=input("\nWhat's your name?")
    response=input("Which mountain would you like to climb someday?")
    responses[name]=response#將答案填充到字典中
    repeat=input("Y/N?")#設置一個標志，決定是否繼續
    if repeat=='N':
        polling_active=False

print("\n===========Poll Results========== ")    #調查結束，顯示結果
for name,response in responses.items():
    print(name+" would like to climb "+response+'.')     

'''
注意：
1.填充字典的方法
2.字典輸出的方法

'''

>>> 
====================== RESTART: D:/python學習/7.3/填充字典.py ======================

What's your name?張三
Which mountain would you like to climb someday?泰山
Y/N?Y

What's your name?Tom
Which mountain would you like to climb someday?Alps
Y/N?N

===========Poll Results========== 
Tom would like to climb Alps.
張三 would like to climb 泰山.
>>>