[Python] Can't activate Python environment after creating it in bash [duplicate]

I have the following script myenv.sh:

#!bin/bash
echo "####### Install automated template ########"
python3 -m venv .venv
source .venv/bin/activate
pip install --upgrade pip
pip install ipykernel pandas seaborn scikit-learn
echo "######## Done ########"


So I run the script, and it creates the environment but doesn't stay activated. Perhaps it is exiting. So I tried this:

#!bin/bash
echo "####### Install automated template ########"
python3 -m venv .venv
source .venv/bin/activate
pip install --upgrade pip
pip install ipykernel pandas seaborn scikit-learn
source ${PWD}/.venv/bin/activate
echo "######## Done ########"


But nothing happens. Please, could you point out what I am doing wrong?

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