use class inside a class python code example

Example: muitiple inner classes in python

class Outer:
    """Outer Class"""

    def __init__(self):
        ## Instantiating the 'Inner' class
        self.inner = self.Inner()
        ## Instantiating the '_Inner' class
        self._inner = self._Inner()

    def show_classes(self):
        print("This is Outer class")
        print(inner)
        print(_inner)

    class Inner:
        """First Inner Class"""

        def inner_display(self, msg):
            print("This is Inner class")
            print(msg)

    class _Inner:
        """Second Inner Class"""

        def inner_display(self, msg):
            print("This is _Inner class")
            print(msg)

    ## ...