请编写一个python程序，定义一个形状类，包含属性-形状名、面积、周长，除初始化方法外，定义方法-算面积，算周长。然后，定义三个子类，三角形、矩形、圆形，分别重写算面积、算周长的方法。最后，定义相应子类的对象来验证类是否成功定义。

当然，这是一个简单的Python程序示例，展示了如何创建一个基础形状类和它的几个子类：

class Shape:
    def __init__(self, name):
        self.name = name
        self.area = None
        self.perimeter = None

    # 定义通用的方法计算面积和周长
    def calculate_area(self):
        raise NotImplementedError("Subclasses must implement this method")

    def calculate_perimeter(self):
        raise NotImplementedError("Subclasses must implement this method")


class Triangle(Shape):
    def __init__(self, base, height):
        super().__init__("Triangle")
        self.base = base
        self.height = height

    def calculate_area(self):
        return 0.5 * self.base * self.height

    def calculate_perimeter(self):
        return self.base + self.height


class Rectangle(Shape):
    def __init__(self, length, width):
        super().__init__("Rectangle")
        self.length = length
        self.width = width

    def calculate_area(self):
        return self.length * self.width

    def calculate_perimeter(self):
        return 2 * (self.length + self.width)


class Circle(Shape):
    def __init__(self, radius):
        super().__init__("Circle")
        self.radius = radius

    def calculate_area(self):
        return 3.14159 * (self.radius ** 2)

    def calculate_perimeter(self):
        return 2 * 3.14159 * self.radius


# 测试和验证子类
triangle = Triangle(3, 4)
print(f"Triangle area: {triangle.calculate_area()}")
print(f"Triangle perimeter: {triangle.calculate_perimeter()}")

rectangle = Rectangle(5, 6)
print(f"Rectangle area: {rectangle.calculate_area()}")
print(f"Rectangle perimeter: {rectangle.calculate_perimeter()}")

circle = Circle(2)
print(f"Circular area: {circle.calculate_area()}")
print(f"Circular perimeter: {circle.calculate_perimeter()}")