pyhton之第八章函数复习8.1-8.3 

  1 # time 2021/11/11
  2 """8.1函数的定义"""
  3 """
  4 语法 :   def 函数名():
  5             函数体
  6         函数名()
  7 8.1.1 向函数传递信息
  8 语法 :   def 函数名(args):
  9             函数体
 10         函数名(abc)
 11 8.1.2 形参与实参: 
 12         形参:    定义时 写写入函数名括号里面的参数
 13         实参:    调用时写入的参数
 14         实参 传给 形参 代入到函数体中
 15 """
 16 """8.2传递实参"""
 17 """
 18 8.2.1位置参数
 19       def describe_pet(animal_type, pet_name)
 20             print(f'{animal_type}, {pet}')
 21         
 22     
 23       describe_pet('pig', 'haiyuan' )
 24 8.2.2关键字参数
 25       def describe_pet(animal_type, pet_name)
 26             print(f'{animal_type}, {pet}') 
 27     
 28       describe_pet(animal_type = 'pig', pet_name = 'haiyuan' )
 29 8.2.3默认值
 30      def describe_pet(animal_type, pet_name='yuxin')
 31             print(f'{animal_type}, {pet}') 
 32     
 33      describe_pet(animal_type = 'pig' )
 34 note : 使用默认值时,在形参列表中必须先列出没有默认值的形参,再列出有默认值的实参,这让python依然可以准确的解读位置参数
 35 note : 默认值参数也是可以修改的
 36 """
 37 """8.3返回值"""
 38 """
 39 8.3.1 返回简单值
 40 def get_formatted_name(first_name, last_name):
 41     full_name = first_name + last_name
 42     return full_name.title()
 43 
 44 musician = get_formatted_name('jimi','hendrix')
 45 print(musician)
 46 
 47 8.3.2
 48 
 49 """
 50 
 51 
 52 def get_formatted_name(first_name, last_name, middle_name=''):
 53     if middle_name:
 54         print(f'{first_name.title()},  {last_name.title()}, {middle_name.title()}')
 55     else:
 56         print(f'{first_name.title()},  {last_name.title()}')
 57 
 58 
 59 get_formatted_name('yuxin1', 'abc12')
 60 get_formatted_name('yuxin2', 'abc32', 'niehaiyuan')
 61 
 62 
 63 # 8-1
 64 def display_message():
 65     print('本章学的内容是函数')
 66 
 67 
 68 display_message()
 69 
 70 
 71 # 8-2
 72 def favorite_book(title):
 73     print(f'my favorite book is {title}')
 74 
 75 
 76 favorite_book('python进阶')
 77 
 78 
 79 # 8-3
 80 def make_shirt(size, fort):
 81     print(f'T恤的尺码是{size},字样是{fort}')
 82 
 83 
 84 make_shirt(175, '中国红')
 85 
 86 
 87 # 8-4
 88 def make_shirt(size, fort='I love Python'):
 89     print(f'T恤的尺码是{size},字样是{fort}')
 90 
 91 
 92 make_shirt('大号')
 93 make_shirt('中号')
 94 make_shirt('小号', 'PYHTON')
 95 
 96 
 97 # 8-5
 98 def describe_city(name, country):
 99     print(f'{name.title()} is in {country.title()}')
100 
101 
102 describe_city('beijing', 'China')
103 describe_city('reykjavik', 'iceland')
104 
105 
106 # 8-6
107 def city_country(name, country):
108     s = f'"{name}, {country}"'
109     return s
110 
111 
112 print(city_country('beijing', 'China'))
113 print(city_country('东京', '日本'))
114 print(city_country('洛杉矶', '美国'))
115 
116 # 8-7
117 
118 
119 # def make_album(singer_name, paper_name, num=''):
120 #     dic = {}
121 #     dic[singer_name] = paper_name
122 #
123 #     if not num:
124 #         return dic
125 #     else:
126 #         dic['专辑数量'] = num
127 #         return dic
128 #
129 #
130 # print(make_album('yuxin1', 'abc123', num=10))
131 # print(make_album('yuxin2', 'def456'))
132 
133 # 8-8
134 dic = {}
135 while 1:
136     singer_name = input("请输入歌手的名字:")
137     if singer_name == "0":
138         break
139     paper_name = input("请输入专辑的专辑:")
140     if paper_name == "0":
141         break
142     dic[singer_name] = paper_name
143     print('输入0为退出')
144 
145 
146 def make_album():
147     if len(dic) == 0:
148         return '无信息'
149     return dic
150 
151 
152 print(make_album())
153 # 2021/11/11

 

posted @ 2021-11-11 23:14  余鑫2020  阅读(31)  评论(0)    收藏  举报