Issue when launching Jupyter lab

[jenil59]

When I am launching the jupyter lab from CMD or ANACONDA .given error shown.
Traceback (most recent call last):
File "C:\ProgramData\anaconda3\Scripts\jupyter-lab-script.py", line 6, in
from jupyterlab.labapp import main
File "C:\ProgramData\anaconda3\lib\site-packages\jupyterlab_init_.py", line 7, in
from .handlers.announcements import ( # noqa
File "C:\ProgramData\anaconda3\lib\site-packages\jupyterlab\handlers\announcements.py", line 14, in
from jupyter_server.base.handlers import APIHandler
File "C:\ProgramData\anaconda3\lib\site-packages\jupyter_server\base\handlers.py", line 21, in
from tornado import escape, httputil, web
File "C:\Users<user>\AppData\Roaming\Python\Python310\site-packages\tornado\httputil.py", line 106, in
class HTTPHeaders(collections.MutableMapping):
AttributeError: module 'collections' has no attribute 'MutableMapping'

suggest what i should do. steps

[welcome]

Thank you for opening your first issue in this project! Engagement like this is essential for open source projects! 🤗

If you haven't done so already, check out Jupyter's Code of Conduct. Also, please try to follow the issue template as it helps other other community members to contribute more effectively.

You can meet the other Jovyans by joining our Discourse forum. There is also an intro thread there where you can stop by and say Hi! 👋

Welcome to the Jupyter community! 🎉

[asteppke]

Hi @jenil59

It looks like your python installation is not working as it is supposed to. Your jupyter lab is coming from anaconda installed in C:\ProgramData\anaconda3 whereas the Tornado HTTP server is coming from ...Appdata\Roaming\Python\Python310\....

So I would make sure you do not have any python in your PATH environment variable and then go through the normal conda init steps to setup your environment in a consistent way.

[JasonWeill]

@jenil59 Thanks for your contribution! You can follow our installation instructions here: https://jupyterlab.readthedocs.io/en/latest/getting_started/installation.html . If you notice any additional issues after following the linked guide, please open a new issue.