Upload a file using oAuth 2.0 google-api in python, credential.json should be saved in the same folder, any update to the scope needed delete the token .pickle from the root folder

google-drive-uploader.py

from __future__ import print_function
import pickle
import os.path
from googleapiclient.discovery import build
from google_auth_oauthlib.flow import InstalledAppFlow
from google.auth.transport.requests import Request
from googleapiclient.http import MediaFileUpload, MediaIoBaseUpload

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

def main():
    """Shows basic usage of the Drive v3 API.
    upload a file to the google drive using oAuth 2.0
    """
    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.getsize('token.pickle') > 0:
    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('drive', 'v3', credentials=creds)

    # Call the Drive v3 API
    results = service.files().list(
        pageSize=20, fields="nextPageToken, files(id, name)").execute()
    items = results.get('files', [])

    # if not items:
    #     print('No files found.')
    # else:
    #     print('Files:')
    #     for item in items:
    #         print(u'{0} ({1})'.format(item['name'], item['id']))

    file_metadata = {'name': 'photo.jpg'}
    media = MediaFileUpload('photo.jpg',
                            mimetype='image/jpeg')
    file = service.files().create(body=file_metadata,
                                        media_body=media,
                                        fields='id').execute()
    # print 'File ID: %s' % file.get('id')

if __name__ == '__main__':
    main()