Bob Belderbos bbelderbos

Hi there, I'm Bob 👋

🐍 Python software developer & coach
🧠 Co-Founder of Pybites – practical, project-driven Python training
📚 I love books / reading, yet my focus is shipping real projects, not just consuming more tutorials.

PDI – Beginner Coaching: 1:1 support for people taking their first serious steps into Python.
PDC – Project / Cohort Coaching: Guided, project-based cohorts where you ship real apps and learn modern dev practices. Beginner and intermediate Python, in progress: Rust, Agentic AI, and Django.
PDM – Professional Developer Mindset: Flagship 1:1 intermediate / advanced program: mentoring, systems, and feedback to grow into a trusted senior developer.
Pybites Platform: 400+ hands-on Python exercises that teach idiomatic, tested code with instant feedback.
Rust for Python Devs:
- Writing at rsbit.es about Rust from a Pythonista’s perspective.
- Building rustplatform.com with practical Rust exercises and step up to project building in our upcoming Rust cohort coaching program.
Talk Python “100 Days of Code” courses: Co-created two 100 Days of Code courses with Talk Python (Python and Web dev) to help people level up through daily practice.
Pybites Books: Django-powered, clutter-free reading tracker to log books, mark favourites, and share what you’re reading — built to inspire reading and help kids (and adults) spend less time on screens.

Started in support & finance, automating my work with Excel + VBA macros.
Saw a painful problem: tons of telemetry bundles, no tool to analyse them.
Built a scrappy PHP app that processed thousands of bundles for hundreds of engineers.
That project put me on the map: I was pulled into automation work and finally became a full-time developer.

No CS degree — just JIT learning, persistence, and a lot of increasingly complex projects building up real-world experience. 💡

Now I help others escape tutorial hell, ship things, and build careers around it. 🚀

Escaping tutorial paralysis and designing a project roadmap
Writing clean, tested, idiomatic Python – and sharing what I’m learning as I dive deeper into Rust and other languages
Building CLIs, web apps, and automations that actually get used
Levelling up from “coder” to trusted engineer / senior dev
Creating systems for consistent learning: exercises, reading, and reflection
Turning your editor (especially Vim) and terminal into real productivity multipliers –
Supercharge Your Vim Workflow · 9 Command Line Tips Every Developer Should Know

I feel that it's safe to say that every Python dev here has faced this error at some point:
AttributeError: 'NoneType' object has no attribute 'get'

Somewhere, somehow, a function returned None when you expected data. (09 Feb 2026) - link
"Rust is too hard."
I hear this constantly from Python developers. The borrow checker. Lifetimes. Ownership. It sounds intimidating.

Here's the truth: Rust is different, not harder. (08 Feb 2026) - link
I love how we go deep into Rust core features in our Scripter to Rust cohort.
Code example that came up: (06 Feb 2026) - link

Follow me »

Binary search: Binary search in Python? Don’t write it yourself. ... (06 Feb 2026) - link
Mermaid Diagrams in GitHub READMEs: GitHub renders Mermaid diagrams natively in markdown files. Just use a fenced code block with `mermaid` as the language. ... (05 Feb 2026) - link
Reliable CI Benchmarks with pytest-codspeed: Traditional CI benchmarks are noisy (10-30% variance) because they measure wall-clock time. CodSpeed uses CPU instruction simulation instead, giving you <1% variance—so you can actually trust the results. ... (28 Jan 2026) - link
Convert any Jupyter notebook to Markdown (fast): If you want to extract a notebook into a clean, shareable text format (great for READMEs, docs, or blog drafts), convert `.ipynb` → Markdown with MyST: ... (28 Jan 2026) - link
Create GitHub issues faster from the CLI: Combine `gh`, `fzf`, and your `$EDITOR` to create issues without leaving the terminal: ... (27 Jan 2026) - link

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