jupyter notebook bad interpreter error message

Question

I tried to use jupyter notebook with kernel python3, but I got this error message.

anonymous$ jupyter notebook
/usr/local/opt/python/bin/python2.7: bad interpreter: No such file or directory

Information about python and pip installed on mac (i used pip3 to install jupyter ):

anonymous$ which -a python python2 python2.7 python3 python3.6
/usr/bin/python
/usr/bin/python2.7
/usr/local/bin/python3
/usr/local/bin/python3.6
anonymous$ which -a pip pip2 pip3
/usr/local/bin/pip
/usr/local/bin/pip3

Tried to solve it with "brew update && brew upgrade jupyter" as the other post suggested but did not work. Got an error message saying that "Error: jupyter not installed".

Answer 1

You must have installed jupyter with another package manager such as pip. You can try pip uninstall jupyter followed by brew install jupyter.

If you get the message:

Error: The `brew link` step did not complete successfully 
The formula built, but is not symlinked into /usr/local 
Could not symlink bin/jupyter 
Target /usr/local/bin/jupyter already exists.

You can try brew link --overwrite jupyter as suggested.