pip install -r requirements.txt

Create following files in the same directory with main.py

touch credentials.json
touch client_id.json
touch contacts.txt
touch content.json

1. Follow instructions in here to get app password.
2. Change email and app password in credentials.json

{
    "email": "<your email>",
    "app_password": "<your app password>"
}

1. Follow instructions in here to OAuth2 credentials.
2. Paste all information of json file you downloaded into client_id.json

Config your subject and file id in content.json

{
    "subject": "<your subject>",
    "file_id": "<your file id>"
}

Write your user email(s) in contacts.txt in the same directory with main.py

john [email protected]
marry [email protected]

To send google doc file as a content to email

python main.py

Note: You may be login for fisrt time to get app code