python day 27
Recently there are so many Singing TV shows, The Big Band, Super Band, Sisters in Winds and Waves, Rap of China. So today let’s make a Python Abstract Class that is able to pass to subclasses and print out song lyrics about cute animals.
Why do we choose these songs?
Because it’s my program so i can print out the songs I like!
If you have different choices, It is a great time to start making your own program!
Key Point:
ABCs, ABCMeta, abstractmethod
The module grant us to contsruct an Abstract Bases Class, which only declare, but contains NO implementation.
It requires subclasses to provide implementations for the abstract methods.
Python Code:
from abc import ABCMeta, abstractmethod
class pet(object, metaclass=ABCMeta):
def __init__(self, nickname):
self._nickname= nickname
@abstractmethod
def song(self):
pass
class snail(pet):
def song(self):
print("a little %s is going up step by step! \n小小 %s 要一步一步往上爬! \n" %(self._nickname,self._nickname ), end="\n")
class kitty(pet):
def song(self):
print("Let's be %s meow meow meow, make a little naughty sound \n我们一起学 %s 叫，一起喵喵喵喵... \n" %(self._nickname,self._nickname), end="\n")
class dragon(pet):
def song(self):
print("There's a %s in the far east, his name is China \n遥远的东方有一条 %s，他的名字叫中国 \n" %(self._nickname,self._nickname), end="\n")
class horse(pet):
def song(self):
print("You are like a wild %s , but i dont have a land of grass. \n你是一匹野 %s, 可惜我家里没有草原 \n" %(self._nickname,self._nickname), end="\n")
Make a Def to call the class
def pet_song():
pets=[snail("snail"), kitty("kitty"), dragon("dragon"), horse("horse")]
for pet in pets:
pet.song()
pet_song()
Output:
a little snail is going up step by step! 小小 snail 要一步一步往上爬! Let's be kitty meow meow meow, make a little naughty sound 我们一起学 kitty 叫，一起喵喵喵喵... There's a dragon in the far east, his name is China 遥远的东方有一条 dragon，他的名字叫中国 You are like a wild horse , but i dont have a land of grass. 你是一匹野 horse, 可惜我家里没有草原
Happy Studying and Have fun singing!!
Ref:
https://www.python-course.eu/python3_abstract_classes.php
歌曲：
蜗牛-周杰伦 jay chou
一起学猫叫 – 小峰峰
龙的传人 -王力宏 leehom wang
董小姐- 宋东野