base.py

import pickle
import os.path
from googleapiclient.discovery import build
from google_auth_oauthlib.flow import InstalledAppFlow
from google.auth.transport.requests import Request
import utils as ut

# If modifying these scopes, delete the file token.pickle.
SCOPES = ['https://www.googleapis.com/auth/gmail.readonly']


def main():
 """Shows basic usage of the Gmail API.
 Lists the user's Gmail labels.
 """
 creds = None
 # The file token.pickle stores the user's access and refresh tokens, and is
 # created automatically when the authorization flow completes for the first
 # time.
 if os.path.exists('token.pickle'):
 with open('token.pickle', 'rb') as token:
 creds = pickle.load(token)
 # If there are no (valid) credentials available, let the user log in.
 if not creds or not creds.valid:
 if creds and creds.expired and creds.refresh_token:
 creds.refresh(Request())
 else:
 flow = InstalledAppFlow.from_client_secrets_file(
 'credentials.json', SCOPES)
 creds = flow.run_local_server(port=0)
 # Save the credentials for the next run
 with open('token.pickle', 'wb') as token:
 pickle.dump(creds, token)

 service = build('gmail', 'v1', credentials=creds)

 # Call the Gmail API
 results = service.users().labels().list(userId='me').execute()
 labels = results.get('labels', [])

 # if not labels:
 # print('No labels found.')
 # else:
 # print('Labels:')
 # for label in labels:
 # print(label['name'])
 return service


# if __name__ == '__main__':
# main()