main,py

from __future__ import print_function
import datetime
import secrets
import pickle
import os.path
import json
import hashlib
import bencode
from googleapiclient.discovery import build
from google_auth_oauthlib.flow import InstalledAppFlow
from google.auth.transport.requests import Request

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


def main():
    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('calendar', 'v3', credentials=creds)

    #get calendar list
    """calendars_result = service.calendarList().list(showHidden=True).execute()
    calendars = calendars_result.get('items', [])
    print(calendars)"""

    with open("primo1.json") as f:
        cal = json.loads(f.read())
    calId = cal[0]["title"]
    print(calId)

    try:
        resCalendar = service.calendars().get(calendarId=calId).execute()
    except:
        newCal = {}
        newCal["timeZone"] = "Europe/Rome"
        newCal["summary"] = str(calId.split(" ", 1)[0])
        newCal["kind"] = "calendar#calendar"
        newCal["id"] = str(calId.replace(" ", ""))
        newCal["etag"] = str(hashlib.md5(bencode.bencode(newCal)).hexdigest())
        #print(newCal["etag"])

        newCal = json.dumps(newCal)
        res = service.calendars().insert(body=newCal).execute()
    #print(resCalendar)

    """if not events:
        print('No upcoming events found.')
    for event in events:
        start = event['start'].get('dateTime', event['start'].get('date'))
        print(start, event['summary'])"""


if __name__ == '__main__':
    main()