Activate venv with
venv\scripts\activate

Install requirements with 
pip install -r requirements.txt

Update requirements.txt with
pip freeze > requirements.txt

When using pyinstaller or auto_py_to_exe to create executable,
use --add-data to import ``/venv/Lib/site-packages/googleapiclient/discovery_cache/documents``
as 
googleapiclient/discovery_cache/documents/
to properly include critical google api files 

Also use --onedir