Jupyter：创建笔记本失败，加载笔记本时出错

Question

我在使用Jupyter笔记本电脑时遇到一些问题。

首先，该应用程序似乎是“不受信任的”，并在提示无法执行任何操作时单击“信任”：

第二，尝试创建新的Jupyter笔记本时出现以下错误：

Creating Notebook Failed:

The error was: Unexpected error while saving file: Desktop/Complete-Python-3-Bootcamp-master/03-Methods and Functions/Untitled.ipynb database is locked

第三，如果我尝试加载其他Jupyter笔记本，则会遇到问题。例如，尝试从Jupyter的“ Python Bootcamp”打开03-Function Practice Exercises.ipynb

我得到以下信息：

Error loading notebook
An unknown error occurred while loading this notebook. This version can load notebook formats or earlier. See the server log for details.

jupyer_mac.command终端日志：

[W 14:40:06.678 NotebookApp] Notebook Desktop/Complete-Python-3-Bootcamp-master/03-Methods and Functions/04-Function Practice Exercises - Solutions.ipynb is not trusted

并且：

[E 14:57:45.839 NotebookApp] Uncaught exception GET /api/contents/Desktop/Complete-Python-3-Bootcamp-master/03-Methods%20and%20Functions/03-Function%20Practice%20Exercises.ipynb?type=notebook&_=1562536665698 (::1)
HTTPServerRequest(protocol='http', host='localhost:8890', method='GET', uri='/api/contents/Desktop/Complete-Python-3-Bootcamp-master/03-Methods%20and%20Functions/03-Function%20Practice%20Exercises.ipynb?type=notebook&_=1562536665698', version='HTTP/1.1', remote_ip='::1')
Traceback (most recent call last):
  File "/anaconda3/lib/python3.7/site-packages/tornado/web.py", line 1699, in _execute
    result = await result
  File "/anaconda3/lib/python3.7/site-packages/tornado/gen.py", line 209, in wrapper
    yielded = next(result)
  File "/anaconda3/lib/python3.7/site-packages/notebook/services/contents/handlers.py", line 112, in get
    path=path, type=type, format=format, content=content,
  File "/anaconda3/lib/python3.7/site-packages/notebook/services/contents/filemanager.py", line 433, in get
    model = self._notebook_model(path, content=content)
  File "/anaconda3/lib/python3.7/site-packages/notebook/services/contents/filemanager.py", line 392, in _notebook_model
    self.mark_trusted_cells(nb, path)
  File "/anaconda3/lib/python3.7/site-packages/notebook/services/contents/manager.py", line 503, in mark_trusted_cells
    trusted = self.notary.check_signature(nb)
  File "/anaconda3/lib/python3.7/site-packages/nbformat/sign.py", line 439, in check_signature
    return self.store.check_signature(signature, self.algorithm)
  File "/anaconda3/lib/python3.7/site-packages/nbformat/sign.py", line 239, in check_signature
    (datetime.utcnow(), algorithm, digest),
sqlite3.OperationalError: database is locked
[W 14:57:45.840 NotebookApp] Unhandled error

这只是最近才开始发生，我不知道为什么。这些错误（无法创建新笔记本和无法打开现有笔记本）似乎都源于某种权限问题。我不应该打开上面图像列表中的一些笔记本文件，而不会出现任何问题。任何帮助表示赞赏！