python - 如何在工厂类静态方法中访问基类属性？

Question

我在工厂类静态方法中访问基类属性时遇到问题

class BaseGeometryShape:
    """
    Base class for geometry objects
    """
    def __init__(self, name):
        self.name = name

class ShapeFactory:
   
    @staticmethod
    def create_shape(shape: str, params: List[str]):
        #todo
    
def get_info(shape: str, params: List[str]):
    shape = ShapeFactory.create_shape(shape, params)
    info = shape.name + '\n'

    return info

我假设我必须在 ShapeFactory 类中使​​用 BaseGeometryShape 类，因为 get_info() 函数中有 shape.name 行。希望有人知道这件事。谢谢。

Answer 1

通常，当我们谈论工厂方法时，您会将它们构建到类中，如下所示：

class Shape:
    def __init__(self, length, width):
        self.length = length
        self.width = width
        
    @staticmethod
    def square(x):
        return Shape(x,x)
    
    @staticmethod
    def rectangle(length, width):
        return Shape(length, width)

或另一个例子，如果这有意义的话：

class Pizza:
    def __init__(self, toppings):
        self.toppings = toppings

    @staticmethod
    def magarita():
        return Pizza(['cheese', 'tomato sauce'])

    @staticmethod
    def hawaiian():
        return Pizza(['pineapple', 'pizza sauce'])