pluma/00_unanchay/pluma/pluma-notebook-kernel-python

pluma-notebook-kernel-python

Python kernel for the pluma notebook.

Built on top of RustPython — pure native Rust, no CPython, no subprocess, not compiled to WASM. The VM runs synchronously inside tokio::task::spawn_blocking (RustPython uses Rc/RefCell and is not Send), with a fresh boot per cell. No network, no fs by default.

API

Implements the Kernel trait from pluma-notebook-exec:

use pluma_notebook_kernel_python::PythonKernel;
use pluma_notebook_exec::Kernel;

let k = PythonKernel::new();
let out = k.execute("2 + 3", "python").await?;

Accepts the languages python and py. Dual execution strategy:

1. Eval: tries to parse source as an expression → repr() of the value into OutputPayload::Text; int/float also fill OutputPayload::Scalar(f64).
2. Exec: if eval fails, re-parses as statements (assignments, defs, prints, …).

print() is captured via a sys.stdout monkey-patch (a _PlumaCapture class injected in the preamble) and surfaces in KernelOutput::stdout alongside the value.

Deps

• pluma-notebook-core, pluma-notebook-exec
• rustpython-vm
• async-trait, tokio (rt, sync)