CODEWITHSUNDEEP
pythonkerneljupyter-notebook
nac001
nac001

Reputation: 795

Failed to start the kernel on jupyter notebook

I have python versions 3.6.5_1 and 3.7.0installed via Homebrew.
jupyter needs python3.6 for launching. It wouldn't start if I switch to python3.7.

After launching, it fails to start the kernel with this error:

File "/usr/local/Cellar/python/3.6.5_1/Frameworks/Python.framework/Versions/3.6/lib/python3.6/subprocess.py", line 1344, in _execute_child
raise child_exception_type(errno_num, err_msg, err_filename)
FileNotFoundError: [Errno 2] No such file or directory: '/usr/local/opt/python/bin/python3.7': '/usr/local/opt/python/bin/python3.7'

From what I understand, the kernel is looking for python3.7. My kernel list has just python3

$jupyter kernelspec list  
Available kernels:  
python3    /usr/local/etc/jupyter/kernels/python3

I looked at this link on github, but it wasn't helpful. How do I make jupyter and the kernel running on the same python version?

Upvotes: 19

Views: 84377

Answers (6)

Au Wai Lun
Au Wai Lun

Reputation: 46

netsh winsock reset

In cmd with administrator, Please implement above order

Upvotes: 0

モブ Mobu
モブ Mobu

Reputation: 29

step 2 command:

conda activate <location of your env folder>

step 3 command:

python -m ipykernel install --user

works!

Upvotes: 1

Alex Jean
Alex Jean

Reputation: 682

I had same issue - tried all the above without success.

Context: using Windows on that machine, for a few years. I have used this machine as a "code on the go when I need to" laptop and have not been very careful nor consistent when installing/upgrading python versions or libraries or environments.

The fix for me - somehow a folder that contained f2py.exe (Numpy - on top of which Pandas is built) was not in the path and was in a hidden folder that ended with "\Scripts". Python itself was fine in the environment variables. They were in very different folders - while normally they should be in close branches in the folder tree. Adding the full path of the folder ending with "\Scripts" that have f2py.exe in the environment variables solved the kernel issue for me.

Upvotes: 0

shivampip
shivampip

Reputation: 2144

Updating the jupyter notebook resolved the issue for me. But remember, update it using command line. Not Anaconda Navigator

pip install -U jupyter

Upvotes: 12

Patrick Glettig
Patrick Glettig

Reputation: 601

In case anyone anyone reading this who runs Jupyter Notebook from within Anaconda and gets the same error:

I found a workaround by installing Jupyter using pip in the command prompt (not anaconda prompt): 

$pip install jupyter

and then start Jupyter using the known way

$cd 'DirectoryofyourNotebook'
$jupyter notebook

Upvotes: 2

nac001
nac001

Reputation: 795

Check the kernel specifications: 

$jupyter kernelspec list

This will show you the available kernels. In this case:

python3    /usr/local/etc/jupyter/kernels/python3

Open the kernel.json file in this directory and specify the path of python you want the kernel to use in the argv key.

Upvotes: 27

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