Python编程从入门到实践（六）-用户输入和while循环

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#parrot.py
message = input("Tell me something, and I will repeat it back to you: ")
print(message)

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#greeter.py
name = input("Please enter your name: ")
print("Hello, " + name + "! ")

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#greeter.py
prompt = "If you tell us who you are, we can personalize the messages you see."
prompt += "n What is your first name? "
name = input(prompt)
print("nHello, " + name + "! ")

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age = input("How old are you? ")
age = int(age)
print(age >= 18)

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#rollercoaster.py
height = input("How tall are you, in inches? ")
height = int(height)
if height >= 36:
    print("nYou're tall enough to ride! ")
else:
    print("nYou'll be able to ride when you're a little older.")

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#even_or_odd.py
number = input("Enter a number, and I'll tell you if it's even or odd: ")
number = int(number)
if number % 2 == 0:
    print("nThe number " + str(number) + " is even.")
else:
    print("nThe number " + str(number) + " is odd.")

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#counting.py
current_number = 1
while current_number <= 5:
    print(current_number)
    current_number += 1

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#parrot.py
prompt = "nTell me something, and I will repeat it back to you:"
prompt += "nEnter 'quit' to end the program. "
message = ""
while message != 'quit':
    message = input(prompt)
    print(message)

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#parrot.py
prompt = "nTell me something, and I will repeat it back to you:"
prompt += "nEnter 'quit' to end the program. "
message = ""
while message != 'quit':
    message = input(prompt)
    if message != 'quit':
        print(message)

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#parrot.py
prompt = "nTell me something, and I will repeat it back to you:"
prompt += "nEnter 'quit' to end the program. "
active = True
while active:
    message = input(prompt)
    if message == 'quit':
        active = False
    else:
        print(message)

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#parrot.py
prompt = "nTell me something, and I will repeat it back to you:"
prompt += "nEnter 'quit' to end the program. "
while True:
    city = input(prompt)
    if city == 'quit':
        break
    else:
        print("I'd love to go to " + city.title() + "! ")

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#counting.py
current_number = 0
while current_number < 10:
    current_number += 1
    if current_number % 2 == 0:
        continue
    print(current_number)

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#confirmed_users.py
# 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())

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

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#mountain_poll.py
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 + ".")