1.函数是带名字的代码块，用于完成具体的工作，存储在被称为模块的独立文件中。

（1）定义函数def 函数名（形参），函数体（功能），返回值

（2）形参与实参。

定义一个获取姓名与成绩的函数，函数名为get_full_information，函数功能为将name与score拼接起来，返回值为names+scores。函数需指定两个变量names与scores，称为形式参数。

调用函数时，get_full_information(name, score)，name与score为实际参数，也叫实参。

def get_full_information(names, scores):
    information = names+' '+scores
    return information.title()
while True:
    print("(enter 'q' to quit)")
    name = input("What's your name: ")
    if name == 'q':
        break
    score = input("Your score: ")
  
    full_information = get_full_information(name, score)
    print(get_full_information)



out:(enter 'q' to quit)
What's your name: wangming
Your score: 99
<function get_full_information at 0x00000192B97D5EE0>
(enter 'q' to quit)
What's your name: lihang
Your score: 88
<function get_full_information at 0x00000192B97D5EE0>
(enter 'q' to quit)
What's your name: q

2.通过while循环，不断循环将姓名与成绩信息通过input（）函数输入函数中并调用。

调用函数时，有三种方式：

第一种，实参的顺序默认和形参对应一致。例子中name对应names，score对应scores。

第二种，在实参中将名称和值关联，采用如下方式调用函数。

 full_information = get_full_information(names='name', scores='score')

第三种，定义函数时，为形参scores设定默认值scores='99'，调用时，只需指定根据实参name为形参names指定值即可

def get_full_information(names, scores='99'):
    information = names+' '+scores
    return information.title()
while True:
    print("(enter 'q' to quit)")
    name = input("What's your name: ")
    if name == 'q':
        break
    #scores = input("your score: ")
     
    full_information = get_full_information(name)
    print(full_information)

设定默认真。

3.传递列表

编写两个函数，一个负责处理成绩统计，另一个概述完成了那些成绩统计。

def scores_finished(unfinished_score,finished_score):
    while unfinished_score:
        finishing_score = unfinished_score.pop()
        print('finishing score: '+finishing_score)
        finished_score.append(finishing_score)

def show_finished_score(finished_score):
    print("The following scores have been finished:")
    for score in finished_score:
        print(finished_score)

unfinished_score=['wangming','tom','tony']
finished_score=[]

scores_finished(unfinished_score,finished_score)
show_finished_score(finished_score)



out:finishing score: tony
finishing score: tom
finishing score: wangming
The following scores have been finished:
['tony', 'tom', 'wangming']
['tony', 'tom', 'wangming']
['tony', 'tom', 'wangming']

参考文献《Python 编程从入门到实践》，中国工信出版社