BLPAPI synchronous session to get SUMMARY event data only

Question

Based on an example/demo Python code application will do async subscription for events when eventHandler is supplied.

Example code for that looks like:

    print("Session options: %s" % session_options)
    eventHandler = SubscriptionEventHandler()
    # Create a Session
    session = blpapi.Session(session_options, eventHandler.processEvent)

that will create subscription session which will return all events.

So in case of a synchronous session I expect to create a session which will looks like

     session = blpapi.Session(session_options)

but then how can I specify events which I want to subscribe (SUMMARY in my case) and only for a one time? Python BLPAPI SDK says something about nextEvent() but I can't find any example how to use it.

Answer 1

If just want to get a one time snapshot, then you don't want to create a subscription. Just use the reference data service instead(/blp/refdata) and request the fields you want for the list of securities you are interested in. Subscriptions are continuous updates.

https://data.bloomberglp.com/labs/sites/2/2013/12/blpapi-developers-guide-1.38.pdf