【Google Calendar API #3】イベントを追加してみる

from __future__ import print_function
from datetime import datetime, timedelta
import os.path
from googleapiclient.discovery import build
from google_auth_oauthlib.flow import InstalledAppFlow
from google.auth.transport.requests import Request
from google.oauth2.credentials import Credentials

SCOPES = ['https://www.googleapis.com/auth/calendar']

def main():
    # 認証
    creds = None
    if os.path.exists('token.json'):
        creds = Credentials.from_authorized_user_file('token.json', SCOPES)
    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)
        with open('token.json', 'w') as token:
            token.write(creds.to_json())

    # イベントの日付を設定
    now_dt = datetime.utcnow() + timedelta(hours=9, days=1)
    now_d = now_dt.strftime("%Y-%m-%d")

    # イベントの詳細を作成
    event = {
        'summary' : 'A new python event',
        'description' : 'Test event',
        'start':{
            'date' : now_d,
            'timeZone' : 'Japan'
        },
        'end':{
            'date' : now_d,
            'timeZone' : 'Japan'
        }
    }

    # 認証し、オブジェクトを作成
    service = build('calendar', 'v3', credentials= creds)
    # イベントを追加
    res = service.events().insert(calendarId='primary', body=event).execute()
    # イベントの追加した結果を出力
    print(res)

if __name__ == '__main__':
    main()