Question

I have gone through this: What is a metaclass in Python?

But can any one explain more specifically when should I use the meta class concept and when it’s very handy?

Suppose I have a class like below:

 class Book(object):
    CATEGORIES = ['programming','literature','physics']
    def _get_book_name(self,book):
        return book['title']
    def _get_category(self, book):
        for cat in self.CATEGORIES:
            if book['title'].find(cat) > -1:
                return cat  
        return "Other"


if __name__ == '__main__':
    b = Book()
    dummy_book = {'title':'Python Guide of Programming', 'status':'available'}
    print b._get_category(dummy_book)

For this class.

In which situation should I use a meta class and why is it useful?

Thanks in advance.

Answer 1

check the link Meta Class Made Easy to know how and when to use meta class.