Python学习笔记——函数

#8-1  定义函数
def display_message():
    print('Chapter 8 functionn')

display_message()

#8-2 函数参数，函数返回值
def read_title():
    book=input('Plz enter your favorite book: ')
    return book

def favorite_book(book):
    print('One of your favorite books is',book,'.n')

book=read_title()
favorite_book(book)

#8-3 8-4 位置实参，关键字实参，默认实参
def make_shirt(word='I love python',size='L'):
    print('word:',word,'   size:',size,'n')

def shirt():
    print('Plz enter following information(or enter default):')
    shirt_word=input('word on the shirt:')
    shirt_size=input('size:')
    if shirt_word=='default':
        if shirt_size=='default':
            make_shirt()
        else:
            make_shirt(size=shirt_size)
    else:
        
        if shirt_size=='default':
            make_shirt(shirt_word)
        else:
            make_shirt(shirt_word,shirt_size)

shirt()

#8-6 8-7 8-8  返回字典
def make_album(singer='Jay',title='床边故事',num=0):
    album={}
    if num==0:
        album['singer']=singer
        album['title']=title
    else:
        album['singer']=singer
        album['title']=title
        album['quantity']=num
    return album

def user_album():
    information=['singer:','title:','quantity(enter 0 to skip):']
    i=0
    inf=[]
    while i<3:
        sentence='Plz enter '+information[i]
        temp=input(sentence)
        if i!=2:
            inf.append(temp)
        else:
            if int(temp)!=0:
                inf.append(temp)
        i+=1
    if len(inf)==3:
        a=make_album(inf[0],inf[1],inf[2])
    else:
        a=make_album(inf[0],inf[1])
    print(a)

user_album()
print('n')

#8-9 8-10 8-11  函数传递列表
def show_magicians(mgcs):
    for mgc in mgcs:
        print(mgc)

def make_great(mgcs):
    print('do not change the list:')
    i=0
    for mgc in mgcs:
        mgcs[i]='the great '+mgc
        i+=1
    show_magicians(mgcs)

mgcs=['XiaoMing','XioaoHong','XiaoMa']
make_great(mgcs[:])
print('magicians:')
show_magicians(mgcs)
print('n')

#8-12  任意数量实参
def sandwich(*sws):
    for sw in sws:
        print(sw)
    print('n')

sandwich('a sandwich','b sanwich','c sandwich')

#8-14  任意数量实参——字典
def make_car(brand,model,**others):
    car={}
    car['brand']=brand
    car['model']=model
    for key,value in others.items():
        car[key]=value
    return car

car=make_car('奥迪','A8',color='red',tow_package=True)
print(car)
print('n')

最后

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