opens zoom to the next/current meeting on your calendar.If distributing publicly, please remove the client secret. fill in your calendar id before use.

zoom.py

#!/usr/bin/env python3
# opens zoom to the next/current meeting on your calendar
# license: Apache 2.0

calendar="YOUR_USERNAME@instructure.com"

import datetime
import pickle
import os.path
try:
    import keyring
    from googleapiclient.discovery import build
    from google_auth_oauthlib.flow import InstalledAppFlow
    from google.auth.transport.requests import Request
except ImportError:
    sys.exit("""Missing dependencies:
                install using
                pip3 install --upgrade keyring google-api-python-client google-auth-httplib2 google-auth-oauthlib
                """)
import re
import webbrowser
from base64 import b64encode, b64decode

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

client_config = {
    "installed": {
        "client_id": "254617732984-ai6hqc6l9n6n6nf48eg0mp92of3g8qh8.apps.googleusercontent.com",
        "project_id": "zoom-launcher-262516",
        "auth_uri": "https://accounts.google.com/o/oauth2/auth",
        "token_uri": "https://oauth2.googleapis.com/token",
        "auth_provider_x509_cert_url": "https://www.googleapis.com/oauth2/v1/certs",
        "client_secret": "bqjrga1nZs2_ow4Gn3hp96Mq",
        "redirect_uris": ["urn:ietf:wg:oauth:2.0:oob","http://localhost"]
    }
}

def main():
    domain = "com.cobbal.zoom-launcher"
    creds = None
    try:
        creds = pickle.loads(b64decode(keyring.get_password(domain, calendar)))
    except:
        pass
    # 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_config(client_config, SCOPES)
            creds = flow.run_local_server(port=0)
        # Save the credentials for the next run
        keyring.set_password(domain, calendar, b64encode(pickle.dumps(creds)).decode('ascii'))

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

    now = datetime.datetime.utcnow()
    start = now.isoformat() + 'Z' # 'Z' indicates UTC time
    end = (now + datetime.timedelta(days=1)).isoformat() + 'Z' # 'Z' indicates UTC time
    events_result = service.events().list(calendarId='primary', timeMin=start, timeMax=end,
                                          maxResults=10, singleEvents=True,
                                          orderBy='startTime').execute()
    events = events_result.get('items', [])

    zoomRe = re.compile(r"https://\w+.zoom.us/j/(\d{9})")
    zoomId = None

    suggested = False
    for event in events:
        start = event['start'].get('dateTime', event['start'].get('date'))
        matches = zoomRe.search(event['description'])
        if matches:
            print(start, event['summary'])
            url = "zoommtg://zoom.us/join?confno={}".format(matches[1])
            print(url)
            suggested = True
            if "n" in input("is this correct? [Yn] "):
                continue
            webbrowser.open(url)
            break
    else:
        print("No {}zoom meetings found on your calendar".format("other " if suggested else ""))

if __name__ == '__main__':
    main()