whatstyle.py 文件源码

def update_evaluations(formatter,  # type: CodeFormatter
                       evaluations,  # type: List[AttemptResult]
                       finished_styles,  # type: List[AttemptResult]
                       bestdist  # type: Sequence[int]
                       ):
    # type: (...) -> Tuple[bool, bool, Sequence[int]]
    attemptresult = heapq.heappop(evaluations)
    nested_round = False
    if bestdist is None or (distquality(attemptresult.distance) < distquality(bestdist)):
        bestdist = attemptresult.distance
        heapq.heappush(evaluations, attemptresult)
    else:
        # We found a style that could no longer be improved by adding a single option value.
        heapq.heappush(finished_styles, attemptresult)
        nested_styles = formatter.nested_derivations(attemptresult.formatstyle)
        if not nested_styles:
            # This formatstyle does not unlock more options.
            return True, nested_round, bestdist
        # Restart the optimization from scratch with the attemptresult augmented with
        # every nested option as seed styles.
        bestdist = None
        ndist = (HUGE_DISTANCE, HUGE_DISTANCE, HUGE_DISTANCE, HUGE_DISTANCE)
        evaluations[:] = [AttemptResult(ndist, s) for s in nested_styles]
        nested_round = True
    return False, nested_round, bestdist