ImportError: cannot import name 'constants' from partially initialized module 'zmq.backend.cython'

[ggrrll]

Hi,

I am not able to launch notebook, as it returns the same error as in #3435

neither pip un/install pyzmq or jsonschema worked

I am on Mac OS 10.15.5 and jupyter

jupyter core     : 4.6.3
jupyter-notebook : 6.0.3
qtconsole        : 4.5.5
ipython          : 8.0.0.dev
ipykernel        : not installed
jupyter client   : not installed
jupyter lab      : 1.2.3
nbconvert        : 5.6.1
ipywidgets       : not installed
nbformat         : 5.0.4
traitlets        : 4.3.3

Thanks for your help

(you can also reply in this SO post if you want)

[ggrrll]

ok, I had two python v. 3.7 and 3.8 – I removed 3.7 and now it's 'fine' (I still have to link the kernel, etc...)

[wang-nima]

hi @ggrrll how do you remove other python version? and how do you find all python version installed on Mac?

[ggrrll]

(btw, I still have v. 2.7) – just open a terminal window, type python, press tab key and the autocomplete will show you what you have :)

[Mohsinrazaa]

Hey , use the following:
pip uninstall pyzmq
pip install pyzmq

The thing with conda is that it has a lot of conflicts, you might be having a conflict. Using simple pip command would help you to remove those conflicts. I mean it worked for me. I hope it helps

[kmsandeep]

Hey , use the following:
pip uninstall pyzmq
pip install pyzmq

The thing with conda is that it has a lot of conflicts, you might be having a conflict. Using simple pip command would help you to remove those conflicts. I mean it worked for me. I hope it helps

It worked. Thanks