The latest articles on DEV Community by Gurtej Singh (@gurtej_singh_919c17a8753e). https://dev.to/gurtej_singh_919c17a8753e https://media2.dev.to/dynamic/image/width=90,height=90,fit=cover,gravity=auto,format=auto/https:%2F%2Fdev-to-uploads.s3.us-east-2.amazonaws.com%2Fuploads%2Fuser%2Fprofile_image%2F4069616%2F22313dc5-75b9-4173-b527-77a77330cc22.jpeg https://dev.to/gurtej_singh_919c17a8753e en Gurtej Singh Sun, 09 Aug 2026 08:20:03 +0000 https://dev.to/gurtej_singh_919c17a8753e/from-keywords-to-pypi-designing-building-and-publishing-your-own-programming-language-27eh https://dev.to/gurtej_singh_919c17a8753e/from-keywords-to-pypi-designing-building-and-publishing-your-own-programming-language-27eh <p><a href="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.us-east-2.amazonaws.com%2Fuploads%2Farticles%2Fhgnh4w46m49getukl3su.png" class="article-body-image-wrapper"><img src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.us-east-2.amazonaws.com%2Fuploads%2Farticles%2Fhgnh4w46m49getukl3su.png" alt=" " width="800" height="400"></a><br> A complete, practical engineering guide to building a programming language from the ground up — using a real, working project (MultiLang Engine) as a case study throughout. The guide walks through what a language implementation actually is architecturally (lexing, keyword resolution, parsing, evaluation), then breaks down MultiLang Engine's own design: a multi-dialect interpreter that lets the same engine understand English, Hinglish, Punjabi, Sanskrit, and Gen Z slang by treating keywords as swappable, user-editable data rather than hard-coded tokens.</p> <p>From there it moves into a hands-on build guide for creating your own interpreter step by step — designing your instruction set, building the keyword/grammar layer, implementing the core dispatch loop (print, assignment, conditionals, loops, input), and wiring up a CLI and REPL.</p> <p>The second half covers turning that interpreter into a real, installable tool: packaging it with setup.py and MANIFEST.in, building distribution files, and publishing to PyPI both manually with Twine and via automated GitHub Actions releases using PyPI's Trusted Publishing. It closes with a list of common pitfalls (missing data files, version conflicts, eval() safety, keyword collisions, platform differences) and concrete ideas for extending the project further — plus a summary checklist and further reading for anyone who wants to go deeper into interpreter and compiler design.</p> <p>You can see the guide on my Github Accoun =&gt; <a href="https://github.com/gurtej9602/MultiLangEngine/blob/main/README.md" rel="noopener noreferrer">https://github.com/gurtej9602/MultiLangEngine/blob/main/README.md</a> </p> programming python softwaredevelopment tutorial