step.timeout

Classes

Timeout

Wrap a step with a time limit, cancelling it if it runs too long.

Module Contents

class step.timeout.Timeout(step: step.Step, seconds: float | int)

Bases: step.Step

Wrap a step with a time limit, cancelling it if it runs too long.

Executes the given step normally but enforces a maximum wall-clock duration. If the wrapped step completes within the budget, the timeout step finishes successfully. If the step exceeds the time limit, it is cancelled via asyncio.wait_for and an error is logged. Any exception raised by the wrapped step propagates normally.

This is especially useful around blocking steps like motor_move_to or wait_for_button that could stall indefinitely if the hardware misbehaves.

Parameters:

• step – The step to execute under a time constraint. Must be a valid Step (or StepProtocol) instance.

• seconds – Maximum allowed execution time in seconds. Must be positive.

Example:

from raccoon.step import timeout
from raccoon.step.motor import motor_move_to

# Give the arm 5 seconds to reach position 300; cancel if stuck
timeout(
    motor_move_to(robot.motor(2), position=300, velocity=800),
    seconds=5.0,
)

# Ensure operator presses button within 30 seconds
timeout(wait_for_button(), seconds=30.0)

step

seconds

result = None

collected_resources() → frozenset[str]