Пример шаблон проектирования Строитель на Python.
""" Separate the construction of a complex object from its representation so that the same construction process can create different representations. """ import abc class Director: """ Construct an object using the Builder interface. """ def __init__(self): self._builder = None def construct(self, builder): self._builder = builder self._builder._build_part_a() self._builder._build_part_b() self._builder._build_part_c() class Builder(metaclass=abc.ABCMeta): """ Specify an abstract interface for creating parts of a Product object. """ def __init__(self): self.product = Product() @abc.abstractmethod def _build_part_a(self): pass @abc.abstractmethod def _build_part_b(self): pass @abc.abstractmethod def _build_part_c(self): pass class ConcreteBuilder(Builder): """ Construct and assemble parts of the product by implementing the Builder interface. Define and keep track of the representation it creates. Provide an interface for retrieving the product. """ def _build_part_a(self): pass def _build_part_b(self): pass def _build_part_c(self): pass class Product: """ Represent the complex object under construction. """ pass def main(): concrete_builder = ConcreteBuilder() director = Director() director.construct(concrete_builder) product = concrete_builder.product if __name__ == "__main__": main()