启动jupyterlab怎么会出现这样的问题

[weixin_45585403]

求问通过anaconda启动jupyterlab怎么会出现这样的问题，请问如何解决

[weixin_45585403]

Traceback (most recent call last):
File "F:\anaconda\Scripts\jupyter-lab-script.py", line 5, in
from jupyterlab.labapp import main
File "F:\anaconda\lib\site-packages\jupyterlab\labapp.py", line 14, in
from jupyterlab_server import slugify, WORKSPACE_EXTENSION
File "F:\anaconda\lib\site-packages\jupyterlab_server\__init__.py", line 4, in
from .app import LabServerApp
File "F:\anaconda\lib\site-packages\jupyterlab_server\app.py", line 9, in
from .server import ServerApp
File "F:\anaconda\lib\site-packages\jupyterlab_server\server.py", line 20, in
from notebook.notebookapp import aliases, flags, NotebookApp as ServerApp
File "F:\anaconda\lib\site-packages\notebook\notebookapp.py", line 80, in
from .services.contents.manager import ContentsManager
File "F:\anaconda\lib\site-packages\notebook\services\contents\manager.py", line 17, in
from nbformat import sign, validate as validate_nb, ValidationError
File "F:\anaconda\lib\site-packages\nbformat\__init__.py", line 32, in
from .validator import validate, ValidationError
File "F:\anaconda\lib\site-packages\nbformat\validator.py", line 12, in
from jsonschema import ValidationError
File "F:\anaconda\lib\site-packages\jsonschema\__init__.py", line 11, in
from jsonschema.exceptions import (
File "F:\anaconda\lib\site-packages\jsonschema\exceptions.py", line 152, in
@attr.s(hash=True)
AttributeError: module 'attr' has no attribute 's'

[stliu_hbjd]

我的也出现同样的问题，经过在网上查询，利用下面方法解决，可以尝试一下。先用这个命令pip uninstall attr卸载，然后pip install attrs 安装这个。成功解决，可以登录jupter notebook。同时使用Spyder时，登录提示的，You have missing dependencies!nbconvert >=4.0: None (NOK) Please install them to avoid this message. 也不在出现。