GRB stands for Gamma-Ray Burst.
Install python virtualenv package using pip : pip install virtualenv .
Create a virtual enviroment using :python -m venv env .
Install the requirements using : pip install -r requirements.txt .
For each new package you add to the project, add the name of the package to the requirements.in file and use the command below and the requirements.txt file will be updated:
pip-compile requirements.in