Python 3 Deep Dive Part 4: Mastering Object-Oriented Programming (OOP)
Python resolves diamond inheritance cleanly via MRO. Example:
def check_out(self): if self._checked_out: raise RuntimeError("Already checked out") self._checked_out = True python 3 deep dive part 4 oop
Python avoids traditional explicit getter and setter methods ( get_value() / set_value() ) in favor of properties. Properties let you wrap attribute access behind function logic while maintaining clean dot-notation syntax. The Underlying Descriptor Protocol
class DeepDiveDemo: # Evaluated immediately during class definition platform_name = "Deep Dive Masterclass" print("Executing code inside the class body definition!") def __init__(self, version): self.version = version Use code with caution. Python 3 Deep Dive Part 4: Mastering Object-Oriented
Python uses ABCs for collections.abc (e.g., Iterable , Sequence , MutableMapping ).
Use __slots__ when you are creating where the set of attributes is strictly predefined (data processing pipelines, game entities, etc.). | Category | Methods | |----------|---------| | Object
| Category | Methods | |----------|---------| | Object lifecycle | __new__ , __init__ , __del__ | | Representation | __repr__ , __str__ , __bytes__ | | Comparison | __eq__ , __lt__ , __le__ , __gt__ , __ge__ , __ne__ | | Numeric operators | __add__ , __sub__ , __mul__ , __matmul__ , __truediv__ , etc. | | Container emulation | __len__ , __getitem__ , __setitem__ , __delitem__ , __contains__ | | Iteration | __iter__ , __next__ | | Callable objects | __call__ | | Context managers | __enter__ , __exit__ | | Attribute access | __getattr__ , __setattr__ , __delattr__ , __getattribute__ |
: Focus on single inheritance and the role of special "dunder" methods in polymorphism. Advanced Control : Coverage of
By default, Python uses the type metaclass to construct classes. However, you can write custom metaclasses to intercept, modify, validate, or register classes at the exact moment they are defined by the compiler. Creating a Custom Metaclass