定义一个名为Triangle的三角形类，使其继承Shape抽象类，覆盖Shape类中的抽象方法perimeter()和area()。编写程序测试Triangle类的使用。

好的，我明白了您的要求。以下是Triangle类的定义和测试程序：

# Shape抽象类定义
from abc import ABC, abstractmethod

class Shape(ABC):

    @abstractmethod
    def area(self):
        pass

    @abstractmethod
    def perimeter(self):
        pass

# Triangle类
class Triangle(Shape):

    def __init__(self, base, height, side1, side2):
        self.base = base
        self.height = height
        self.side1 = side1
        self.side2 = side2

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

    def perimeter(self):
        return self.base + self.side1 + self.side2

# 测试程序
t = Triangle(3, 4, 5, 6)
print("Triangle area: ", t.area())
print("Triangle perimeter: ", t.perimeter())

输出结果为：

Triangle area:  6.0
Triangle perimeter:  14