Chapter 2

Answer 1

The chain of responsibility pattern inside Python allows us to build an application with loose coupling in mind. This is achieved by passing a received request through a chain of objects inside the software.

The following code snippet shows the implementation of the chain of responsibility pattern inside Python:

import abc

class Handler(metaclass=abc.ABCMeta):
    """Handler provides an interface to build handlers."""

    def __init__(self, handler=None):
        """Initialize the handler.

        Keyword arguments:
        handler -- The next handler object to be called
        """

        self._next_handler = handler

    @abc.abstractmethod
    def handler...