📜 Externum
**Externum v3.0 'Sentient'** — a fully functional programming language of our own that fuses Python's readability, binary performance and Bash's
📜 Externum
🧪 View animated test results — 120/120 →
Externum v3.0 "Sentient" — a fully functional programming language of our own that fuses Python's readability, binary performance and Bash's system control into one paradigm.
Externum = Python_readability ⊕ Binary_performance ⊕ Bash_control
One source file (.ext) compiles to three targets at once: Python,
Bash and a binary representation — and the run mode executes the program
directly. There is also a REPL, a module system and its own
standard library written in Externum itself.
✨ What it can do
| Area | Support |
|---|---|
| Data types | lists, dicts, tuples, sets (including multi-line), f-strings, 0b/0x literals |
| Control flow | if/elif/else, while, for ... in (multi-variable), break/continue, try/except/else/finally, with, assert |
| Functions | default parameters, *args/**kwargs, recursion, lambdas, closures, generators (yield) |
| OOP | classes, inheritance, methods, self |
| Modules | import, own .ext modules, standard library |
| Expressions | full operator precedence, bitwise & | ^ ~ << >>, ternary, comprehensions |
| Shell | inline bash `cmd` and %% ... %% blocks |
| Tooling | REPL, 3 compile targets, argv |
🚀 Quick start
git clone https://github.com/BartoszOsiej/externum.git
cd Externum
pip install -e . # Python 3.10+
externum --version # Externum 3.0.0
# Run a program
externum run examples/pokedex.ext
# Interactive shell
externum repl🕹️ Try it live
The playground below executes Externum entirely in your browser — the transpiler (written in Python) runs through WebAssembly (Pyodide), with no server at all. Click ▶ Run and watch the program execute:
📚 Standard library (in Externum)
| Module | Contents |
|---|---|
structs | Stack, Queue, Counter |
strings | reverse, is_palindrome, slugify, word_count, capitalize, truncate |
mathx | clamp, is_even, gcd, fib, factorial, sum_of_digits |
fs | read_file, write_file, append_file, file_exists, list_dir |
🗺️ Documentation
- Syntax — the complete language guide
- Examples — working programs with output
- Compiler & CLI — targets and options
- Architecture — pipeline, modules, roadmap