使用nltk之类的库时,“自动完成”选项卡就像是一件好事,它可以轻松地列出正在使用的模块的函数和属性。几个月前它还可以正常工作,但最近我遇到了一个新问题:自动完成并没有出现。它们一开始似乎工作正常,但一段时间后,内核活动指示器在按下tab键时闪烁,什么也没有发生。在jupyter服务器端,将显示以下消息:
[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__'".
虽然这不会严重阻碍开发过程,但如果它工作正常,它将非常有用
我目前正在使用Python3.8.6 64位(在旧版本中也面临同样的问题),并在Microsoft Edge Chromium中运行笔记本
绝地是这里的问题
你可以通过jupyter魔法解决这个问题。只需在笔记本顶部添加以下内容:
另一种处理方法是删除系统(https://github.com/ipython/ipython/issues/12134#issuecomment-590952054)上的绝地缓存:
你需要清除绝地缓存:只需删除文件夹(linux)
你应该没事的
对于其他操作系统,请检查
https://jedi.readthedocs.io/en/latest/docs/settings.html#filesystem-cache
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