The Python data model specifies a lot of specially named methods that can be overridden in your custom classes to provide them with additional syntax capabilities. You can recognize these methods by their specific naming conventions that wrap the method name with double underscores. Because of this, they are sometimes referred to as dunder. It is simply a speech shorthand for double underscores.
The most common and obvious example of such dunder methods is __init__(), which is used for class instance initialization:
class CustomUserClass:
def __init__(self, initiatization_argument):
...
These methods, either alone or when defined in specific combination, constitute the so-called language protocols. If an object implements specific language protocols, it becomes compatible with specific parts...
