Python从包含函数的类中返回值

class Calculator:
    def add(self, a, b):
        return a + b

    def subtract(self, a, b):
        return a - b

# 创建Calculator类的实例
calc = Calculator()

# 调用实例方法并获取返回值
result_add = calc.add(5, 3)
result_subtract = calc.subtract(5, 3)

print(f"Addition result: {result_add}")        # 输出: Addition result: 8
print(f"Subtraction result: {result_subtract}") # 输出: Subtraction result: 2

class Example:
    def method_without_return(self):
        print("This method does not return anything.")

    def method_with_return(self):
        return "This method returns a value."

ex = Example()

# 调用没有返回值的方法
ex.method_without_return()  # 输出: This method does not return anything.

# 调用有返回值的方法并接收返回值
result = ex.method_with_return()
print(result)  # 输出: This method returns a value.