how to reactivate a virtual env code example
Example 1: virtual environment python
### VIRTUAL ENVIRONMENT
pip install virtualenv
virtualenv pas # write the folder name
.\foldername\Scripts\activate # to activate the virtual environment
pip freeze # to get all the modules in the base interpretor / virtual env
pip freeze > requirements.txt # to set the modules and their versions in the requirement file
pip install -r requirements.txt # to install all the modules with their respected versions in the virtual env
virtualenv --system-site-packages-foldername # this creates virtual env with all the modules and versions that are preinstalled on base python interpretor
deactivate # to come out of the virtual env
Example 2: python virtual environment
python3 -m pip install --user virtualenv