no-unused-value-marker · Python

Why

A standalone _ = value assignment adds a binding without clarifying intent. A side-effecting call can be invoked directly, while an unused parameter should be addressed at its declaration.

Fix

Invoke calls directly instead of assigning their result to _. Remove or rename locally owned unused values; when an external interface requires the exact unused parameter, put a narrow reasoned linter suppression on its declaration.

Examples

Before — flagged Invoke a call directly when its result is intentionally unused

_ = refresh_cache()

After — preferred Run the call without creating a discard binding

refresh_cache()

Before — flagged Do not manufacture a use for interface parameters

def render(root: Path, manifest: Path) -> str:
    _ = root, manifest
    return "ready"

After — preferred Keep a conventional placeholder inside unpacking

name, _ = load_pair()