How to get the result of a long-running Google Cloud Speech API operation later?

Below is a snippet that calls the Google Cloud Speech API long running operation to convert an audio file to text

from google.cloud import speech
speech_client = speech.Client()

audio_sample = speech_client.sample(
    content=None,
    source_uri=gcs_uri,
    encoding='FLAC',
    sample_rate_hertz=44100)

operation = audio_sample.long_running_recognize('en-US')

retry_count = 100
while retry_count > 0 and not operation.complete:
    retry_count -= 1
    time.sleep(60)
    operation.poll()

However, as it is a long running operation, it could take a while and I ideally don't want to keep the session on while it waits. Is it possible to store some information and retrieve the result later ?