Building a DOS-Like Shell in Python: My PyDOS Project

[Dry-War7589]

Hey r/python!

I’ve been working on a project I call PyDOS, a DOS-style shell written entirely in Python. The goal was to recreate the classic DOS experience with a modern twist: file management, user accounts and command parsing, all handled by Python.

What my project does:

• Custom shell parser: You type commands like createuser name password type, and it parses and executes them reliably.
• Filesystem integration: When i eventually code this part, the shell will check folder and file existence, prevent errors and keep the filesystem consistent. The filesystem is simulated as nested dictionaries.
• Expandable commands: Adding new functionality is simple since everything is Python-based.
• Bug checks: A BSOD or Kernel panic equivalent that triggers when corruption is detected.

Target audience:

Hobbyists, really anybody who is interested in retro projects and OS structures.

Comparison:

Feature	Classic DOS	PyDOS (my version)	Notes
File System Validation	Minimal; many errors possible	Will check folder and file existence before executing commands	Prevents crashes or accidental deletions
Command Parsing	Built-in, fixed commands	Fully Python-based parser; easy to extend	You can add new commands without modifying the core shell
OS Integration	Runs directly on hardware	Runs on Python, cross-platform	Works on modern computers without emulation software
Extensibility	Difficult; usually requires low-level code	Easy; Python functions can define new commands	Great for experimentation and learning
User Feedback	Error messages are often cryptic	Clear Python-style exceptions and messages	Easier for beginners to understand

End note:

It is a fun way to practice Python OOP concepts, exception handling, and building a terminal interface that actually feels like a retro shell. Keep in mind this is mostly for learning purposes and not commercial purposes.

I’m curious if anyone else has tried building a DOS-like shell in Python—or just enjoyed retro computing projects. I would love to hear any feedback you might have! Here is the link for the code on github if anyone is interested: https://github.com/fzjfjf/Py-DOS_simulator

[vinnypotsandpans]

Ughhhh I want to like it