Bash script to install jupyterlab into a virtual environment with kernels for python3, python2 and R

_jupyter_kernel_setup

#!/usr/bin/env false

######################################################################
### Script to set up single venv with kernels for python2, 3 and R
######################################################################

main() {

    clear
    echo ">>> Creating python3 venv"
    python3 -m venv .venv
    source .venv/bin/activate

    echo ">>> Installing jupyter with python3 kernel"
    pip install -q jupyterlab

    echo ">>> Creating python2 venv"
    deactivate
    virtualenv -q -p python2 .venv2
    source .venv2/bin/activate

    echo ">>> Creating python2 kernel"
    pip install -q ipykernel

    echo ">>> Exporting python2 kernel"
    python -m ipykernel install --prefix=$PWD/.venv #--name 'Python 2'

    echo ">>> Reactivating python3 venv"
    deactivate
    source .venv/bin/activate

    echo ">>> Installing IRkernel"
    R -q -e "install.packages('IRkernel',repos='https://cran.mtu.edu/',quiet=TRUE)"
    echo ">>> Creating R kernel"
    R -q -e "IRkernel::installspec(prefix=paste(getwd(),'/.venv',sep=''))"

    echo ">>> Finished. Here are the available kernels:"
    jupyter kernelspec list

}

main