RustyPython

RustyPython is a Python interpreter written in Rust.

It is a work in progress and is not yet ready for use.

About

I am building the Python interpreter in Rust to learn more about both languages. The performance of the interpreter is also of great priority, ideally, I want to beat the current RustPython interpreter in terms of run speed. I am taking a different approach to this interpreter than they did. Mine is structured far more like the CPython interpreter, while also trying to maintain simplicity.

Instructions

Rust makes this real simple. Just clone the repo and compile like so.

cargo build --release

Speed

Currently, this is looking about 2-3x slower than CPython. This is not so bad, heading in the right direction. However, it is also about 3-4x faster than RustPython. This is a good sign.

Tests

Currently working on developing a testing suite. I copied some of the simpler tests from the RustPython repo into /tests/from_rustpython and am working on getting them to pass.

For the tests I have written, they are mostly testing the existence and correct implementation of various basic features rather than edge cases yet. Once the assert and method definition is added, more sophisticated tests will be written. However, for now this is the state of the testing system.

Test Name	Status	Notes
test_object	✔️
test_simple	✔️	should include more int operations
test_addition	✔️	optimized 😎
test_deep_for_loop	✔️	optimized 😎
test_while_add	✔️	optimized 😎
test_simple_if_for	✔️	optimized 😎
test_primatives	🚧	need to add all the primatives
test_control_flow	❌	need to add if, strings & indexing
test_tuple	❌	need tuples and tuple unpacking

Supported Features

Feature	Supported	Notes
User-defined Variables	✔️
Print Function	✔️
Operator overloading	✔️
For Loops	✔️	Doesn't support tuple unpacking (yet)
Comments	✔️
If/if-else Statements	✔️
While Loops	✔️	Close to CPython speeds!
Keyword: assert	✔️
Basic Math Operations	🚧	still needs % and //
Math Assign Operations	🚧	still needs //=, @=, **=, no support for in-pace methods yet
Primatives	🚧	int, float, bool, None (limited implementation)
Built in types	🚧	range only
Match Statements	❌
User-defined Functions	❌
User-define classes	❌
User-define modules	❌
Error Handling	❌
Generators	❌
Importing modules	❌
Typeing	❌
Keyword: with	❌
Keyword: global	❌
Keyword: del	❌
Async	❌