Running Jupyter notebook in a virtualenv: installed sklearn module not available

Question

I have installed a created a virtualenv machinelearn and installed a few python modules (pandas, scipy and sklearn) in that environment.

When I run

Answer 1

You probably have not installed jupyter / IPython in your virtualenv. Try the following:

python -c "import IPython"

and check that the jupyter command found in your $PATH is the one from the bin folder of your venv:

which jupyter

For windows users in a powershell console, you can use the following to check that the jupyter command in your $env:Path is the one from the Scripts folder of you venv:

get-command jupyter

Edit: if this is the problem, just run python -m pip install jupyter in your venv.

Edit 2: actually you might also need:

python -m ipykernel install --user --name=my-virtualenv-name

and then switch the kernel named "my-virtualenv-name" in the jupyter user interface.