pyparse

pyparse is a small Python-like language implementation in Rust focused on CPython-compatible semantics (within the supported subset).

What it contains

• Frontend: lexer + parser that build an AST.
• Interpreter backend: direct AST execution.
• VM backend: bytecode compiler + virtual machine.
• Fixture-driven runtime tests under tests/programs/ (including parity checks against CPython, PyPy, and MicroPython where applicable).

Current language support (subset highlights)

• Functions and classes (subset)
• Lists and dictionaries
• for loops via the iterator protocol (__iter__ / __next__)
• Exceptions in interpreter + VM (raise, try/except/finally)
• Built-in exception classes: BaseException, Exception, StopIteration

Development

Use project just commands:

just test
just lint

Scope

This project aims to match behavior in the overlap shared by CPython, PyPy, and MicroPython. Behavior outside that shared overlap is not in scope.