Subclassing

Starting with version 0.2.1., subclassing easytree.dict and easytree.list classes is possible.

Attention

The only requirement is to keep the signature of the __init__ method unchanged in your subclass. You may amend the actual method, but the signature should remain the same.

>>> import easytree

>>> class Person(easytree.dict):
...     def __init__(self, *args, sealed=False, frozen=False, **kwargs):
...         super().__init__(*args, sealed=sealed, frozen=frozen, **kwargs)
...
...     def greet(self):
...         return f"Hello, my name is {self.firstname}"

>>> class Group(easytree.list):
...     def def __init__(self, args=None, *, sealed=False, frozen=False):
...         super().__init__(args, sealed=sealed, frozen=frozen)
...
...     @property
...     def eldest(self):
...         return sorted(self, key=lambda person: person.age)[-1]


>>> group = Group(
...    [
...        Person(firstname="Sally",lastname="S", age=35),
...        Person(firstname="Alice",lastname="G", age=32)
...    ],
...    frozen=True
... )

>>> group.eldest.greet()
'Hello, my name is Sally'

>>> easytree.frozen(group[0])
True