$ git clone <Project A> # Cloning project repository
$ cd <Project A> # Enter to project directory
$ python3 -m venv my_venv # If not created, creating virtualenv
$ source ./my_venv/bin/activate # Activating virtualenv
(my_venv)$ pip3 install -r ./requirements.txt # Installing dependencies
(my_venv)$ deactivate # When you want to leave virtual environment