Build a Python Help Viewer Docstrings, help, and Self Documenting Code
Make your code explain itself. In this build we create a Python Help Viewer from an empty file, a small command-line tool that teaches you three skills every Python developer needs: writing professional docstrings, using the built-in help() function, and understanding code introspection.
You will learn how docstrings attach documentation directly to your objects through the doc attribute, why that is fundamentally different from a regular comment, and how to follow the official PEP 257 conventions so your documentation looks like the standard library's. Then we wire it all into an interactive tool that takes an object name, resolves it safely, and prints its help text, with a starter menu, numeric selection, and clean error handling so it never crashes on messy input.
Along the way we cover a safer alternative to eval() for resolving names from user input, the single-responsibility approach to organizing functions, and the input-validation details that separate a tool people enjoy from one they fight with. By the end you will have a real, reusable utility you can keep around to explore any unfamiliar Python library.
What you will build and learn:
Writing PEP 257 docstrings with summary, Args, and Returns sections
Reading documentation at runtime with help() and doc
Code introspection and resolving names without eval()
Building an interactive command-line loop with graceful error handling
Self-documenting code your future self will thank you for
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