Reference library

OOP & classes

Classes, instances, methods, dataclasses, and object-oriented design in Python.

1 match
OOP & classes medium

How to Use __slots__ in Python Classes for Memory Efficiency

Defines classes with __slots__ to prevent dynamic attribute creation and reduce memory usage, including inheritance with additional slots.

slots oop memory
Python 
```python
class Person:
    __slots__ = ("name", "age")

    def __init__(self, name: str, age: int):
        self.name = name
        self.age = age

    def greet(self) -> str:
        return f"Hi, I'm {self.name} and I'm {self.age} years old."


class Employee(Person):
    __slots__ = ("role",)

    def __init__(se…
13 0 Open

Browse by section

Each section groups closely related Python snippets.

OOP & classes — Python code examples

What you will find here

This page collects oop & classes snippets — short, copy-ready Python you can paste into our free online IDE and run without installing anything. Each sample includes a plain-English explanation and the full source code.

Samples vs tutorials and challenges

Samples are quick reference — one concept per page. For step-by-step teaching, use our Python tutorials. To test yourself, try quizzes or coding challenges. Clean up style with the Python formatter.

Related coding tools

Free online Python IDE Write and run Python in your browser — no install. Free Python code formatter Format with autopep8 — side-by-side PEP 8 cleanup. Python code samples Copy-ready snippets to study and run in the IDE.