python学习7

首先，创建一个待验证用户列表
# 和一个用于存储已验证用户的空列表
unconfirmed_users = [‘alice‘, ‘brian‘, ‘candace‘]
confirmed_users = []
# 验证每个用户，直到没有未验证用户为止
# 将每个经过验证的列表都移到已验证用户列表中
while unconfirmed_users:
    current_user = unconfirmed_users.pop()
    print("Verifying user: " + current_user.title())
    confirmed_users.append(current_user)
# 显示所有已验证的用户
print("\nThe following users have been confirmed:")
for confirmed_user in confirmed_users:
    print(confirmed_user.title())



Verifying user: Candace
Verifying user: Brian
Verifying user: Alice
The following users have been confirmed:
Candace
Brian
Alice

pets = [‘dog‘, ‘cat‘, ‘dog‘, ‘goldfish‘, ‘cat‘, ‘rabbit‘, ‘cat‘]
print(pets)
while ‘cat‘ in pets:
    pets.remove(‘cat‘)
    print(pets)

[‘dog‘, ‘cat‘, ‘dog‘, ‘goldfish‘, ‘cat‘, ‘rabbit‘, ‘cat‘]
[‘dog‘, ‘dog‘, ‘goldfish‘, ‘rabbit‘]

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 + ".")

What is your name? Eric
Which mountain would you like to climb someday? Denali
Would you like to let another person respond? (yes/ no) yes
What is your name? Lynn
Which mountain would you like to climb someday? Devil‘s Thumb
Would you like to let another person respond? (yes/ no) no
--- Poll Results ---
Lynn would like to climb Devil‘s Thumb.
Eric would like to climb Denali.