Python的新手。尝试创建一个简单的示例，演示2个级别的抽象。 收到错误TypeError：“ HPNotebook”对象不可调用“

我浏览了无数示例，但仍然感到困惑。

要理解，我已经在代码中显示了3个级别。
您能指出我一个可以帮助解释此问题以及如何消除它的地方吗？ 提供有关如何更正此问题的建议。 谢谢

from abc import abstractmethod,ABC   #this is to allow abstraction. the ABC forces inherited classes to implement the abstracted methods.

class TouchScreenLaptop(ABC):
    def __init__(self):
        pass
    @abstractmethod      #indicates the following method is an abstract method.
    def scroll(self):    # a function within the parent
        pass             #specifically indicates this is not being defined
    @abstractmethod      #indicates the following method is an abstract method.
    def click(self):    
        pass             #specifically indicates this is not being defined

class HP(TouchScreenLaptop):
    def __init__(self):
        pass
    @abstractmethod         #indicates the following method is an abstract method.
    def click(self):    
        pass  
    def scroll(self):
        print("HP Scroll")

class HPNotebook(HP):
    def __init__(self):
        self()
    def click(self):
        print("HP Click")    
    def scroll(self):
        HP.scroll()

hp1=HPNotebook()
hp1.click()                  #the 2 level deep inherited function called by this instance
hp1.scroll()                 #the 1 level deep inherited function called by this instance