Activate Vertualenv :
source myenv/bin/activate
You are ready to use RASA
De-activate Vertualenv :
deactivate
Update pip
pip3 install -U pip
Create Virtual environment with specific python version
sudo apt install python3.8-venv
python3.8 -m venv myenv
Activate Vertualenv :
source myenv/bin/activate
Install RASA
pip install rasa
rasa --version