[C]增加了用户输入和while的一些使用以及while在列表和字典中的使用

Author: VincentJ

chapter6/Break.py

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+# 使用break跳出循环
+
+prompt = "\nPlease enter the name of a city you have visited:"
+prompt += "\n(Enter 'quit' when you are finished.) "
+while True:
+    city = input(prompt)
+    if city != 'quit':
+        print("I'd love to go to " + city.title() + "!")
+    else:
+        break

chapter6/Continue.py

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+# 使用continue
+num = 0
+while num < 10:
+    num += 1
+    if num % 2 == 0:
+        continue
+    else:
+        print(num)

chapter6/Input.py

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+# input当做字符串来处理
+
+message = input("Tell me something , I will repeat it to U \n")
+print(message)
+
+name = input("Please input your name:\n")
+print("Hello " + name + " !")
+
+# 编写清晰的程序--必要的换行处理
+prompt = "If you tell us who you are, we can personalize the messages you see."
+prompt += "\nWhat is your first name? "
+name = input(prompt)
+print("\nHello, " + name + "!")
+
+# int来处理字符串当做数值
+
+age = input("How old are U ?")
+# 这里是字符串
+print(age)
+# print(age > 10)
+# 这才是数字
+print(int(age))
+
+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.")

chapter6/Mod.py

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+# 取模运算
+print(4 % 3)
+print(4 % -3)
+
+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.")

chapter6/Parrot.py

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+# 使用标识位结束
+
+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':
+        print(message)
+    else:
+        active = True

chapter6/WhileOperation.py

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+num = 0
+while num <= 5:
+    print(num)
+    num += 1
+# 让用户决定什么时候结束程序的运行
+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)

chapter6/confirmed_users.py

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+# 使用While来处理列表和字典
+
+# 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())
+
+# 删除包含特定值的所有列表元素
+pets = ['dog', 'cat', 'dog', 'goldfish', 'cat', 'rabbit', 'cat']
+print(pets)
+while 'cat' in pets:
+    pets.remove('cat')
+print(pets)
+
+# 使用用户输入来填充字典
+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 + ".")