6 Python编程：从入门到实践---用户输入和while循环

函数input()的工作原理

　　函数input()让程序暂停运行，等待用户输入一些文本。获取用户输入后，Python将其存储在一个变量中，以方便你使用。

求模运算符

　　%将两个数相除并返回余数

退出循环方法

　　break&continue

 使用用户输入来填充字典

　　可使用while循环提示用户输入任意数量的信息。下面来创建一个调查程序，其中的循环每次执行时都提示输入被调查者的名字和回答。我们将收集的数据存储在一个字典中，以便将回答同被调查者关联起来

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 + ".")

================================================
执行结果
What is your name? 6666
Which mountain would you like to climb someday? ddd
Would you like to let another person respond? (yes/ no) yes

What is your name? 8888
Which mountain would you like to climb someday? ooo
Would you like to let another person respond? (yes/ no) no

--- Poll Results ---
6666 would like to climb ddd.
8888 would like to climb ooo.