JupyterLab is Broken

Question

我最近刚刚执行了一次更新——全部在conda中。从那时起，我就无法启动Jupyterlab；我试着在Jupyterlab上做了一个额外的更新，没有什么乐趣。我犯了以下错误，失去了主意。非常感谢您的帮助。

c:usersncosgrovanaconda3envsatotilibsite-packagesjupyter_servertransutils.py:13: FutureWarning: The alias `_()` will be deprecated. Use `_i18n()` instead.
warnings.warn(warn_msg, FutureWarning)
[I 2021-06-24 15:03:02.323 ServerApp] jupyter_server_mathjax | extension was successfully linked.
[I 2021-06-24 15:03:02.333 ServerApp] jupyterlab | extension was successfully linked.
[I 2021-06-24 15:03:02.333 ServerApp] jupyterlab_git | extension was successfully linked.
[W 2021-06-24 15:03:02.364 ServerApp] The 'min_open_files_limit' trait of a ServerApp instance expected an int, not the NoneType None.
Traceback (most recent call last):
File "c:usersncosgrovanaconda3envsatotilibrunpy.py", line 193, in _run_module_as_main
"__main__", mod_spec)
File "c:usersncosgrovanaconda3envsatotilibrunpy.py", line 85, in _run_code
exec(code, run_globals)
File "C:UsersncosgrovAnaconda3envsatotiScriptsjupyter-lab.EXE__main__.py", line 7, in <module>
File "c:usersncosgrovanaconda3envsatotilibsite-packagesjupyter_serverextensionapplication.py", line 518, in launch_instance
serverapp = cls.initialize_server(argv=args)
File "c:usersncosgrovanaconda3envsatotilibsite-packagesjupyter_serverextensionapplication.py", line 491, in initialize_server
find_extensions=find_extensions,
File "c:usersncosgrovanaconda3envsatotilibsite-packagestraitletsconfigapplication.py", line 87, in inner
return method(app, *args, **kwargs)
File "c:usersncosgrovanaconda3envsatotilibsite-packagesjupyter_serverserverapp.py", line 1872, in initialize
self.init_server_extensions()
File "c:usersncosgrovanaconda3envsatotilibsite-packagesjupyter_serverserverapp.py", line 1698, in init_server_extensions
self.extension_manager.link_all_extensions(self)
File "c:usersncosgrovanaconda3envsatotilibsite-packagesjupyter_serverextensionmanager.py", line 359, in link_all_extensions
self.link_extension(name, serverapp)
File "c:usersncosgrovanaconda3envsatotilibsite-packagesjupyter_serverextensionmanager.py", line 332, in link_extension
extension = self.extensions[name]
File "c:usersncosgrovanaconda3envsatotilibsite-packagesnbclassicnbserver.py", line 80, in extensions
nb = self._extensions.get("nbclassic")
AttributeError: 'ExtensionManager' object has no attribute '_extensions'

Answer 1

您有一个过时的nbclassic版本，无法与最新的jupyter_server一起使用。使用升级至0.2.8或更新版本

conda install "nbclassic>=0.2.8" -c conda-forge

或者如果使用pip:

pip install -U "nbclassic>=0.2.8"

如果你不使用nbclassic，你也可以禁用它：

jupyter server extension disable nbclassic

GitHub相关问题中有更多信息。