---
title: "Discussion on \"How a Bloom Filter Works: Build One From Scratch in Python\" | Hashnode"
description: "Discussion on \"How a Bloom Filter Works: Build One From Scratch in Python\". A Bloom filter gives you something that feels like magic: it can tell you whether an item is in a set of billions, using only a few kilobytes of memory. And it answers in the same tiny amount of time"
url: "https://hashnode.com/posts/how-bloom-filters-work-build-one-from-scratch-python/6a4286cee47e505c8beef4bb"
---

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# [How a Bloom Filter Works: Build One From Scratch in Python](https://freecodecamp.org/news/how-bloom-filters-work-build-one-from-scratch-python?utm_source=hashnode&utm_medium=feed)

A Bloom filter gives you something that feels like magic: it can tell you whether an item is in a set of billions, using only a few kilobytes of memory. And it answers in the same tiny amount of time

Jun 29 · 12 min read · freecodecamp.org  
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## Written by

[Prasanth Madhurapantula](https://hashnode.com/@catalysed)

@catalysed · Hyderabad, India

  
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Coder, Author and Popcorn Eater

I am not a career software engineer who decided to make a coding site. I am an aerospace-propulsion postgraduate and a cybersecurity practitioner who taught myself to code in order to build across every field I fell in love with, from gas-turbine cycle analysis to malware forensics. The reason any of that was possible is that, at some point, I stopped memorizing syntax and started actually understanding computing, and it became the most useful and the most fun tool I had.

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