[Python] Google Calendar - get an event by ID in python script

I have created an event on Google calendar in python using these lines:

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

now = datetime.datetime.utcnow().isoformat() + 'Z'
events_result = service.events().list(calendarId='primary', timeMin=now,
maxResults=10, singleEvents=True,
orderBy='startTime').execute()

events = events_result.get('items', [])

event = {
'summary': 'EVENT TEST',
'eventId': 'passengerID',
'colorId': '6',
'location': '800 Howard St., San Francisco, CA 94103',
'description': 'A chance to hear more about Google\'s developer products.',
'start': {
'dateTime': '2025-03-07T09:00:00-08:00',
'timeZone': 'America/Los_Angeles',
},
'end': {
'dateTime': '2025-03-07T17:00:00-08:00',
'timeZone': 'America/Los_Angeles',
},
'recurrence': [ ],

'attendees': [
{'email': 'lpage@example.com'},
{'email': 'sbrin@example.com'},
],
'reminders': {
'useDefault': False,
'overrides': [
{'method': 'email', 'minutes': 24 * 60},
{'method': 'popup', 'minutes': 10},
],
},
}

event = service.events().insert(calendarId='primary', body=event).execute()


This works. However, when I try to get the same event by ID using this line:

getEvent = service.events().get(calendarId='primary', eventId='passengerID').execute()


I get this error:

googleapiclient.errors.HttpError: <HttpError 404 when requesting https://www.googleapis.com/calendar/v3/calendars/primary/events/passengerID?alt=json returned "Not Found".
Details: "[{'domain': 'global', 'reason': 'notFound', 'message': 'Not Found'}]">


It seems it cannot find this event. Do you know what I am doing wrong? Thank you!

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