Scribbling

What is interface? Interface is a set of public methods. In python, 'X object', 'X protocol' and 'X interface' have the same meaning. In Python, protocol is pretty dynamic. In below example, FrenchDeck class does not inherit any class (other than default 'object' class). However, the class has sequential protocol as it has two magic methods (__len__, __getitem__). Likewise, in Python, object's d..

To learn sequence protocol in Python, we create a custom vector class. from array import array import math import reprlib class Vector: typecode = 'd' def __init__(self, components): self._components = array(self.typecode, components) def __iter__(self): return iter(self._components) def __repr__(self): components = reprlib.repr(self._components) components = components[components.find('['):-1] ..