text: from __future__ import print_function
  import datetime
  import pickle
  import os.path
  from googleapiclient.discovery import build
  from google_auth_oauthlib.flow import InstalledAppFlow
  from google.auth.transport.requests import Request
  
  # If you modify these scopes, delete the file token.pickle.
  SCOPES = ['https://www.googleapis.com/auth/calendar.events']
  
  def main():
      creds = None
      # The file token.pickle stores the user's access and refresh tokens
      # 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()
          # Save the credentials for the next run
          with open('token.pickle', 'wb') as token:
              pickle.dump(creds, token)
  
      service = build('calendar', 'v3', credentials=creds)
  
      # Read the input file events
      with open("new_events.txt") as f:
          events = f.read().splitlines()
          # Add them to calendar
          for event in events:
              id = service.events().quickAdd(
                  calendarId='primary',
                  text=event).execute()
              if not id:
                  print('"', event, '" not added.')
  
      print("Events added!")
  
  
  if __name__ == '__main__':
      main()
  