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Coding tips and build notes by Mahir Faysal, a student web developer in Bangladesh: tested Python, HTML, CSS, JavaScript and PHP tutorials, plus notes from my Next.js and Gemini projects. Sample posts are marked and drafts stay in the admin area.

All notes Coding tips · 32 Learning notes · 4 Practice · 1

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Coding tips

Python Write List to CSV: Header, Rows and Columns

Save Python lists as a CSV file with the built-in csv module: a header row, list of lists, one column, dicts, no blank lines, appending, and Excel-friendly files.

October 5, 2026 · 14 min read

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Coding tips

Python Write JSON to File With Pretty Print (Tested)

Save a Python dict as a readable JSON file with json.dump(indent=4), keep £ and é as they are, handle datetimes, overwrite safely and append the right way.

October 5, 2026 · 8 min read

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