Forge: A Tiny Calculator Language
Turn text like '3 4 + 5 *' into real answers by building your own interpreter. By the end, the word 'parsing' will never feel like magic again.
What you'll be able to build
Turn text like '3 4 + 5 *' into real answers by building your own interpreter. By the end, the word 'parsing' will never feel like magic again. Along the way you pick up real, transferable Python skills, not just this one project:
- tokenization (splitting input into tokens)
- the stack data structure (list as LIFO)
- dispatch via dicts / operator tables
- error handling & edge cases
- recursion-free evaluation
- writing & running test cases
A course like this one
Yours is built from your own placement, so module count and depth will differ. This map shows what a advanced-level Python learner building Forge actually gets.
- Module 1: Idiomatic Python and comprehensions5 lessons
Builds the production-ready version of the script for your forge.
- Module 2: Profiling and performance5 lessons
Builds the production-ready version of the reusable module for your forge.
- Module 3: Concurrency, async, and I/O5 lessons
Builds the production-ready version of the service boundary for your forge.
- Module 4: Data structures and algorithms5 lessons
Builds the production-ready version of the data flow workflow for your forge.
- Module 5: Iterators and advanced control flow5 lessons
Builds the production-ready version of the function that powers your forge.
- Module 6: Typing and production hardening3 lessons
Builds the production-ready version of the release package for your forge.
How the lessons actually work
Every lesson has you predict what a piece of Python code will output before you run it, then run it for real in your browser and fix what you got wrong. Each module ends in a challenge gate with hidden tests, so you can't advance until your code actually works. The course closes with a capstone that assembles everything into Forge, and a runnable proof page tied to your own code.
Common questions
How long does the Forge: A Tiny Calculator Language course take?
about 7 hours, across 6 modules and 28 lessons, at roughly 15 minutes per lesson. Your own course may run shorter or longer, since it's sized to your placement result, not a fixed template.
Do I need experience?
Yes. This is an advanced-tier Python project, so it assumes you're already comfortable writing and reading Python before you start.
How much does it cost?
$15 one-time, no subscription. The first module is free, so you can see exactly how the course teaches before you pay for the rest.