Jupyter 自动完成/选项卡上的建议不起作用

Question

Jupyter 自动完成/选项卡上的建议不起作用

Ish*_*ena 5 python ipython python-3.x jupyter-notebook

在使用像 nltk 这样的库时，选项卡自动完成就像一个祝福，它可以轻松地列出正在使用的模块的功能和属性。几个月前它曾经工作得很好，但最近我一直面临着自动完成功能未出现的新问题。它们最初似乎工作正常，但一段时间后，内核活动指示器在按下选项卡时只是闪烁，没有任何反应。在jupyter服务器端，出现以下消息：

[IPKernelApp] ERROR | Exception in message handler:
Traceback (most recent call last):
  File "<the path>\venv\lib\site-packages\ipykernel\kernelbase.py", line 268, in dispatch_shell
    yield gen.maybe_future(handler(stream, idents, msg))
  File "<the path>\venv\lib\site-packages\tornado\gen.py", line 735, in run
    value = future.result()
  File "<the path>\venv\lib\site-packages\tornado\gen.py", line 209, in wrapper
    yielded = next(result)
  File "<the path>\venv\lib\site-packages\ipykernel\kernelbase.py", line 583, in complete_request
    matches = yield gen.maybe_future(self.do_complete(code, cursor_pos))
  File "<the path>\venv\lib\site-packages\ipykernel\ipkernel.py", line 360, in do_complete
    return self._experimental_do_complete(code, cursor_pos)
  File "<the path>\venv\lib\site-packages\ipykernel\ipkernel.py", line 385, in _experimental_do_complete
    completions = list(_rectify_completions(code, raw_completions))
  File "<the path>\venv\lib\site-packages\IPython\core\completer.py", line 484, in rectify_completions
    completions = list(completions)
  File "<the path>\venv\lib\site-packages\IPython\core\completer.py", line 1819, in completions
    if c and (c in seen):
  File "<the path>\venv\lib\site-packages\IPython\core\completer.py", line 1876, in _completions
    else:
  File "<the path>\venv\lib\site-packages\IPython\core\completer.py", line 991, in _make_signature
    return '(%s)'% ', '.join([f for f in (_formatparamchildren(p) for p in completion.params) if f])
  File "<the path>\venv\lib\site-packages\IPython\core\completer.py", line 991, in <listcomp>
    return '(%s)'% ', '.join([f for f in (_formatparamchildren(p) for p in completion.params) if f])
  File "<the path>\venv\lib\site-packages\IPython\core\completer.py", line 991, in <genexpr>
    return '(%s)'% ', '.join([f for f in (_formatparamchildren(p) for p in completion.params) if f])
  File "<the path>\venv\lib\site-packages\IPython\core\completer.py", line 968, in _formatparamchildren
    raise ValueError('Jedi function parameter description have change format.'
ValueError: Jedi function parameter description have change format.Expected "param ...", found 'def __subclasshook__'".

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虽然这不会严重妨碍开发过程，但如果它正常工作，那将非常有帮助。

我目前正在使用 python 3.8.6 64 位（在旧版本上也面临同样的问题）并在 Microsoft Edge Chromium 中运行笔记本