Quick Python Tip: Use __slots__ to Reduce Class Memory Usage (2026)

1. 1Define a class with __slots__ to specify the attributes that will be used
2. 2Use the __slots__ attribute to reduce memory usage by avoiding the creation of __dict__ and __weakref__
3. 3Compare the memory usage of a class with and without __slots__ using the sys.getsizeof() function
4. 4Apply __slots__ to classes that have a large number of instances to reduce overall memory usage
5. 5Test the performance impact of using __slots__ on your specific use case

Developers working with large datasets can benefit from this tip to improve performance and reduce memory usage, while data scientists and engineers can apply this technique to optimize their data processing pipelines

💡 Using __slots__ can significantly reduce memory usage for classes with a large number of instances

🚀 Reduce Python class memory usage with __slots__! 🚀