Pub Sub Quick demo for pulling

aa_setup.sh

sudo pip install --upgrade google-cloud-pubsub
gcloud pubsub topics create cp300
gcloud pubsub subscriptions create cpsubs --topic=cp300
python
#that's it.. now just copy the contents of the python file 

pubsub_test.py

from google.cloud import pubsub_v1

subscriber = pubsub_v1.SubscriberClient()

def callback(message):
  print('Received message: {}'.format(message))
  message.ack()

#make sure you replace "javier" with your project name 
subscription_path = 'projects/javier/subscriptions/cpsubs'
subscriber.subscribe(subscription_path, callback=callback)

#just go to https://console.cloud.google.com/cloudpubsub/subscriptions/cpsubs
#and publish some messages. You will see the payload inmediately on cloudshell