# Design Pattern

Composite Pattern
https://ithelp.ithome.com.tw/articles/10207478

import abc

class component(metaclass = abc.ABCMeta):
    

    def __init__(self,name):
        self.name = name
        self.group = []
    
    @abc.abstractmethod
    def add(self,element):
        return NotImplemented
     
    @abc.abstractmethod
    def display(self):
        return NotImplemented

class composite(component):
    def __init__(self,name):
        super(composite,self).__init__(name)
    
    def add(self,element):
        self.group.append(element)
        
    def display(self):
        print(self.name,' manage:')
        print(" ")
        for element in self.group:
            element.display()
        print(" ")       
    
class leaf(component):
    def __init__(self,name):
        self.name = name

    def add(self,element):
        pass 

    def display(self):
        print(self.name)
        
if __name__ == '__main__':       
    company = composite('Gigabyte')
    
    eleCompany = composite('cloudmatrix')
    company.add(eleCompany)
    
    group1 = composite('algro')
    eleCompany.add(group1)
    group1.add(leaf('kebin'))
    group1.add(leaf('lester'))
    
    group2 = composite('system')
    eleCompany.add(group2)
    group2.add(leaf('kiwi'))
    
    
    company.display()

Facade Pattern
https://ithelp.ithome.com.tw/articles/10206318