Python metaclass example

gistfile1.py

# Shows the procedures of metaclass initializing (__init__, __prepare__)
# tested in Python 3.4

class MetaClass(type):
    
    def __init__(self, name, bases, clsdict):
        print('Class defined :')
        print('mro', self.mro())
        print('name', name)
        print('bases', bases)
        print('clsdict', clsdict)
        super().__init__(name, bases, clsdict)
        
    def __prepare__(self, *args, **kwargs):
        print('preparing...')
        return {}


class OrdinaryClass(object, metaclass=MetaClass):
    print('evaluating class body...')