prototype.py

import copy

class Website: 
    def __init__(self, name, domain, description, author, **kwargs): 
        '''Examples of optional attributes (kwargs): 
           category, creation_date, technologies, keywords.
        ''' 
        self.name = name 
        self.domain = domain 
        self.description = description
        self.author = author
        
        for key in kwargs:
            setattr(self, key, kwargs[key])
 
    def __str__(self): 
        summary = [f'Website "{self.name}"\n',] 
        
        infos = vars(self).items()
        ordered_infos = sorted(infos)
        for attr, val in ordered_infos:
            if attr == 'name':
                continue
            summary.append(f'{attr}: {val}\n')
            
        return ''.join(summary) 

        
class Prototype: 
    def __init__(self): 
        self.objects = dict() 
 
    def register(self, identifier, obj): 
        self.objects[identifier] = obj 
 
    def unregister(self, identifier): 
        del self.objects[identifier] 
 
    def clone(self, identifier, **attrs): 
        found = self.objects.get(identifier) 
        if not found: 
            raise ValueError(f'Incorrect object identifier: {identifier}') 
        obj = copy.deepcopy(found) 
        for key in attrs:
            setattr(obj, key, attrs[key])

        return obj
        
def main(): 
    keywords = ('python', 'data', 'apis', 'automation')
    site1 = Website('ContentGardening', 
            domain='contentgardening.com', 
            description='Automation and data-driven apps', 
            author='Kamon Ayeva',
            category='Blog',
            keywords=keywords)
 
    prototype = Prototype() 
    identifier = 'ka-cg-1' 
    prototype.register(identifier, site1)
    
    site2 = prototype.clone(identifier, 
            name='ContentGardeningPlayground',
            domain='play.contentgardening.com', 
            description='Experimentation for techniques featured on the blog', 
            category='Membership site',
            creation_date='2018-08-01') 
 
    for site in (site1, site2): 
        print(site)
    print(f'ID site1 : {id(site1)} != ID site2 : {id(site2)}')
    
if __name__ == '__main__': 
    main()