context-progress 0.1.3

Putting task progress in contextvars

Context Progress

Context Progress lets you emit progress updates from anywhere in a call chain without passing progress objects through every function.

It uses a context-local task stack, so nested work can report progress via a small global API.

Install

Base package:

uv add context-progress

With Rich integration:

uv add 'context-progress[rich]'

Core API

• add(backend): register a backend for the current context.
• remove(backend): unregister a backend.
• subtask(name, description=None, total=None): create a nested task scope.
• update(description=..., total=..., advance=...): push updates to all active backends.

RichProgress

context_progress.richprogress.RichProgress is a Rich backend for the core API.

Use RichProgress.session(...) for the simplest setup. It creates an SProgress instance, registers the backend on enter, and unregisters it on exit.

from time import sleep

from rich.progress import BarColumn, TaskProgressColumn, TextColumn, TimeElapsedColumn

from context_progress import subtask, update
from context_progress.richprogress import RichProgress


def run_step(description: str, total: int, delay: float = 0.1) -> None:
	update(description=description)
	for _ in range(total):
		sleep(delay)
		update(advance=1)


with RichProgress.session(
	TextColumn("[progress.description]{task.description}"),
	BarColumn(),
	TaskProgressColumn(),
	TimeElapsedColumn(),
):
	with subtask("download", total=2):
		run_step("metadata", total=2)
		with subtask("artifacts", total=3):
			run_step("files", total=3)

For a complete runnable example, see examples/richprogress.py.

RichProgress Behavior

• Nested subtasks are indented for readability.
• Child tasks are inserted directly after their parent in render order.
• Updating a RichTask description keeps the task name as a prefix.