Google Calendar API with Python

In this example we will see the main methods to interact with Google Calendar API

Dependencies

pip3 install google-api-python-client google-auth-httplib2 google-auth-oauthlib

Credentials of Google Cloud in JSON

{
  "web": {
    "client_id": "",
    "project_id": "",
    "auth_uri": "",
    "token_uri": "",
    "auth_provider_x509_cert_url": "",
    "client_secret": "",
    "redirect_uris": ["http://localhost/"]
  }
}

Create Service

This allows us to interact with all Google APIs, in this case Calendar

token.txt is generated automatically

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

# IF YOU MODIFY THE SCOPE DELETE THE TOKEN.TXT FILE
SCOPES = ['https://www.googleapis.com/auth/calendar.events',
          'https://www.googleapis.com/auth/calendar']

# THE TOKEN.TXT FILE STORES UPDATE AND USER ACCESS TOKENS

def get_crendetials_google():
    # OPEN THE BROWSER TO AUTHORIZE
    flow = InstalledAppFlow.from_client_secrets_file("creds.json", SCOPES)
    creds = flow.run_local_server(port=0)

    # WE SAVE THE CREDENTIALS
    pickle.dump(creds, open("token.txt", "wb"))
    return creds

def get_calendar_service():
    creds = None
    if path.exists("token.txt"):
        creds = pickle.load(open("token.txt", "rb"))
    # IF IT EXPIRED, WE REFRESH THE CREDENTIALS
    if not creds or not creds.valid:
        if creds and creds.expired and creds.refresh_token:
            creds.refresh(Request())
        else:
            creds = get_crendetials_google()

    service = build("calendar", "v3", credentials=creds)

    return service

Template

{
  "summary": "Important event!",
  "location": "Virtual event (Slack)",
  "description": "This a description",
  "start": {
    "dateTime": "2021-12-10T10:00:00",
    "timeZone": "America/El_Salvador"
  },
  "end": {
    "dateTime": "2021-12-10T11:00:00",
    "timeZone": "America/El_Salvador"
  },
  "attendees": [{ "email": "[email protected]" }],
  "reminders": {
    "useDefault": false,
    "overrides": [
      { "method": "email", "minutes": 30 },
      { "method": "popup", "minutes": 10 }
    ]
  }
}

Create Event

service = get_calendar_service()


def create_event(template: dict):
    try:
        response = service.events().insert(calendarId="primary", body=template).execute()
        return response
    except Exception as e:
        return e.message

Get Event

def get_event(eventId: str):
    try:
        response = service.events().get(calendarId="primary", eventId=eventId).execute()
        return response
    except Exception as e:
        return e.message

Update Event

def update_event(eventId: str, template: dict):
    try:
        response = service.events().update(calendarId='primary',
                                           eventId=eventId, body=template).execute()
        return response
    except Exception as e:
        return e.message

Delete Event

def delete_event(eventId: str):
    try:
        response = service.events().delete(calendarId="primary", eventId=eventId).execute()
        return response
    except Exception as e:
        return e.message