今天分享的是第八章的要点和部分课后习题的参考代码。
要点：
1、函数的定义与使用.
2、位置实参和关键字实参.
3、为参数提供默认值.
4、有返回值的函数.
5、可选实参的用法.
6、用切片表示法[ : ]防止列表作为参数时被修改.
7、传递任意数量的实参.
8、模块与模块特点函数的导入.
参考代码：
8-1
def display_message():
print("We will learn how to use function this chapter")
display_message()
运行结果：
def display_message():
print("We will learn how to use function this chapter")
display_message()
8-2
def favorite_book(title):
print("One of my favorite boks is" + title.title() +".")
favorite_book("Alice in Wonderland")
运行结果：
One of my favorite boks isAlice In Wonderland. [Finished in 0.0s]
8-3略（8-4的简单版）
8-4
def make_shirt(logo = "I love Python" , size = "L"):
print("The logo is " + logo + ".")
print("The size is " + size + ".")
make_shirt()
运行结果：
The logo is I love Python. The size is L. [Finished in 0.0s]
8-5略
8-6
def city_country(city, country):
return city + ', ' + country
print(city_country("Guangzhou", "China"))
print(city_country("New York", "America"))
print(city_country("Tokyo", "Japan"))
运行结果：
Guangzhou, China New York, America Tokyo, Japan [Finished in 0.0s]
8-7略
8-8略
8-9
def show_magicians(magicians): for magician in magicians: print(magician) show_magicians(["liu Qian", "Jack", "Tom"])
运行结果：
liu Qian Jack Tom [Finished in 0.0s]
8-10略
8-11
def show_magicians(magicians): for magician in magicians: print(magician) def make_great(magicians): ms = [] for magician in magicians: magician = "the Great " + magician ms.append(magician) return ms old_magicians = ["liu Qian", "Jack", "Tom"] new_magicians = make_great(old_magicians[:]) show_magicians(old_magicians) print() show_magicians(new_magicians)
运行结果：
liu Qian Jack Tom the Great liu Qian the Great Jack the Great Tom [Finished in 0.0s]
8-12
def add_toppings(*toppings):
print("You add these thing in you sandwich:" )
for topping in toppings:
print(topping)
print()
add_toppings("egg")
add_toppings("apple","fish")
add_toppings("beef","chicken","pork")
运行结果：
You add these thing in you sandwich: egg You add these thing in you sandwich: apple fish You add these thing in you sandwich: beef chicken pork [Finished in 0.0s]
8-13略
8-14
def make_car(grand, model, **other):
car = {}
car['grand'] = grand
car['model'] = model
for key, value in other.items():
car[key] = value
return car
print(make_car('subaru', 'outback', color='blue', tow_package=True))
print(make_car('BMW', 'R', color='white', tow_package=True))
print(make_car('Benz', 's', color='red', tow_package=True))
运行结果：
{'grand': 'subaru', 'model': 'outback', 'color': 'blue', 'tow_package': True}
{'grand': 'BMW', 'model': 'R', 'color': 'white', 'tow_package': True}
{'grand': 'Benz', 'model': 's', 'color': 'red', 'tow_package': True}
[Finished in 0.0s]
8-15
#test1.py
def print1():
print("This is 8-15")
#test1.py
def print1():
print("This is 8-15")
运行结果：
This is 8-15 [Finished in 0.0s]
8-16略
8-17略