求助：OsuLearn运行时出现ZeroDivisionError除零错误如何解决？

错误栈 #

---------------------------------------------------------------------------
ZeroDivisionError                         Traceback (most recent call last)
Cell In[17], line 1
----> 1 data_files = osulearn.dataset.all_files(OSU_FOLDER, verbose=True)
      3 if not os.path.exists('.data'):
      4     os.makedirs('.data')

File c:\Users\danil\OneDrive\Desktop\OsuLearn-master\OsuLearn-master\osulearn\dataset.py:41, in all_files(osu_path, limit, verbose)
     39 for i in range(len(replays)-1, -1, -1):
     40     if verbose:
---> 41         _print_progress_bar(replays, i, reverse=True)
     43     beatmap = _get_replay_beatmap_file(osu_path, replays[i])
     45     if beatmap is None:

File c:\Users\danil\OneDrive\Desktop\OsuLearn-master\OsuLearn-master\osulearn\_cli.py:4, in _print_progress_bar(collection, index, bar_width, buffer_width, reverse)
      1 def _print_progress_bar(collection, index, bar_width=40, buffer_width=80, reverse=False):
      2     bar_format = "\r[{done}>{todo}] {text}"
----> 4     progress = index / (len(collection) - 1)
      5     if reverse:
      6         progress = 1 - progress

ZeroDivisionError: division by zero

问题原因 #

当传入_print_progress_bar函数的collection（此处为replays列表）长度为1时，len(collection)-1等于0，触发除零错误。

修复方案 #

方案1：在进度条函数内部处理边界情况

修改osulearn/_cli.py中的_print_progress_bar函数，增加长度判断：

def _print_progress_bar(collection, index, bar_width=40, buffer_width=80, reverse=False):
    bar_format = "\r[{done}>{todo}] {text}"
    collection_len = len(collection)
    # 处理集合为空或仅含一个元素的情况
    if collection_len <= 1:
        progress = 1.0 if reverse else 0.0
    else:
        progress = index / (collection_len - 1)
    if reverse:
        progress = 1 - progress
    # 保留原函数后续的进度条绘制代码

方案2：在调用进度条函数前过滤无效场景

在osulearn/dataset.py的循环中，仅当replays列表长度大于1时才调用进度条函数：

for i in range(len(replays)-1, -1, -1):
    if verbose:
        if len(replays) > 1:
            _print_progress_bar(replays, i, reverse=True)
    # 保留原循环后续代码

内容的提问来源于stack exchange，提问作者Mirin's Core