human
I wrote the below code

    def yield_errors():
        for log_type in ('step', 'history', 'task'):
            errors = log_interpretation.get(log_type, {}).get('errors')
            for error in (errors or ()):
                (yield error)
    errors = _merge_and_sort_errors(yield_errors())
    if errors:
        return errors[0]
    else:
        return None

What's a good function header?
 ... Here's a good function header?
assistant
#Here's a good function header.

def _pick_error(log_interpretation):