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Builder.py
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51 lines (37 loc) · 877 Bytes
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import abc
class Director:
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):
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):
def _build_part_a(self):
pass
def _build_part_b(self):
pass
def _build_part_c(self):
pass
class Product:
pass
def main():
concrete_builder = ConcreteBuilder()
director = Director()
director.construct(concrete_builder)
product = concrete_builder.product
if __name__ == "__main__":
main()