Python Class Builder

# -*- coding: utf-8 -*-

from copy import deepcopy
from types import MethodType


class ClassBuilder(object):

    def __init__(self, class_name, base_class_collection=(object,)):
        self.class_name = class_name
        self.base_class_collection = base_class_collection
        self.class_attributes = dict()
        self.class_functions = dict()
        self.instance_attributes = dict()
        self.instance_functions = dict()

    def __build_init_function(self):
        def __init_function__(instance_self):
            # Add attributes
            for attr_name, attr_value in list(self.instance_attributes.items()):
                if isinstance(attr_name, str) and len(attr_name) > 0:
                    setattr(instance_self, attr_name, deepcopy(attr_value))
            # Add functions
            for method_name, funct in list(self.instance_functions.items()):
                if isinstance(method_name, str) and len(method_name) > 0 and\
                    hasattr(funct, '__call__'):
                    method = MethodType(funct, instance_self)
                    setattr(instance_self, method_name, method)
        return __init_function__

    def build(self):
        self.class_attributes['__init__'] = self.__build_init_function()
        return type(self.class_name,
            self.base_class_collection,
            self.class_attributes)


#DEBUG
def say_hello(self):
    print('Hello by ' + self.name)
class_builder = ClassBuilder('Human')
class_builder.instance_attributes['books'] = list()
class_builder.instance_attributes['name'] = ''
class_builder.instance_functions['say_hello'] = say_hello
Human = class_builder.build()
human1 = Human()
human1.books.extend(['Human1 Book1', 'Human1 Book2'])
human1.name = 'Maxim'
human2 = Human()
human2.books.append('Human2 Book1')
human2.name = 'Andrey'

human1.say_hello()
print('name = {0}; books = {1}'.format(human1.name, human1.books))
human2.say_hello()
print('name = {0}; books = {1}'.format(human2.name, human2.books))