建造者模式

def solve():
    class Computer:
        def __init__(____):
            self.cpu = None
            self.ram = None
            self.storage = None
    class ComputerBuilder:
        def __init__(____):
            self._computer = Computer()
        def set_cpu(____):
            self._computer.cpu = cpu
            return self
        def set_ram(____):
            self._computer.ram = ram
            return self
        def set_storage(____):
            self._computer.storage = storage
            return self
        def build(____):
            return self._computer
    c = ComputerBuilder().set_cpu(____).set_ram(____).set_storage(____).build()
    print(____)