To use the scripts here:

• Create your credentials file in Google API dashboard and putting it in the current directory, follow this tutorial for detailed information.
• pip3 install -r requirements.txt
• Change our_email variable in common.py to your gmail address.
• To send emails, use the send_emails.py script:

  python send_emails.py --help
  

  Output:

  usage: send_emails.py [-h] [-f FILES [FILES ...]] destination subject body
  
  Email Sender using Gmail API
  
  positional arguments:
  destination           The destination email address
  subject               The subject of the email
  body                  The body of the email
  
  optional arguments:
  -h, --help            show this help message and exit
  -f FILES [FILES ...], --files FILES [FILES ...]
                          email attachments
  

  For example, sending to example@domain.com:

  python send_emails.py example@domain.com "This is a subject" "Body of the email" --files file1.pdf file2.txt file3.img
  

• To read emails, use the read_emails.py script. Downloading & parsing emails for Python related emails:

  python read_emails.py "python"
  

  This will output basic information on all matched emails and creates a folder for each email along with attachments and HTML version of the emails.
• To mark emails as read or unread, consider using mark_emails.py:

  python mark_emails.py --help
  

  Output:

  usage: mark_emails.py [-h] [-r] [-u] query
  
  Marks a set of emails as read or unread
  
  positional arguments:
  query         a search query that selects emails to mark
  
  optional arguments:
  -h, --help    show this help message and exit
  -r, --read    Whether to mark the message as read
  -u, --unread  Whether to mark the message as unread
  

  Marking emails from Google Alerts as Read:

  python mark_emails.py "Google Alerts" --read
  

  Marking emails sent from example@domain.com as Unread:

  python mark_emails.py "example@domain.com" -u
  

• To delete emails, consider using delete_emails.py script, e.g: for deleting emails about Bitcoin:

  python delete_emails.py "bitcoin"
  

• If you want the full code, consider using tutorial.ipynb file.
• Or if you want a all-in-one script, gmail_api.py is here as well!