Blocks until asynchronous operation completes, and returns the error if any.

Parameters:¶

timeout: float | None = None¶

Maximum number of seconds to block.

deadline: float | None = None¶

Deadline in seconds since the Unix epoch.

Returns:¶

The error that was produced by the asynchronous operation, or None if the operation completed successfully.

Raises:¶

• TimeoutError – If the result did not become ready within the specified timeout or deadline.

• KeyboardInterrupt – If running on the main thread and a keyboard interrupt is received.