What is the correct way to interact with Python 3+ class attributes?

Question

Python

class A:
    name = 'default'

a = A()
a.name = 'new'
print('Name =', a.name)

or

class A:
    __name__ = 'default'

    getName = lambda self: self.__name__

    def setName(self, name):
        self.__name__ = name

a = A()
a.setName('new')
print('Name =', a.getName())

As for me, the first option is shorter and more concise, and the second one is more kosher.
But still, which is better?

Answer 1

First, lambda assignment is an antipattern. Secondly, the first option is more idiomatic. Thirdly, if it is necessary to implement the logic of accessing attributes, then it would be more correct to use properties :

class A:
    def __init__(self, name='default'):
        self._name = name

    @property
    def name(self):
        return self._name

    @name.setter
    def name(self, value):
        self._name = value


a = A()
print(a.name)
a.name = 'test'