Subscribing PubNub in python

Question

I am making a small voting system in python and me plan was to have clients that ask the user for there vote and send it off using pubnub. I then wanted to make an application that will recive the votes and count them all up but I cannot find a way to receive the messages. Am I doing this right or is there a better way thanks for your time.

Answer 1

PubNub Voting Tally with Python

You have a few options. It is recommended to use PubNub Storage and Playback via your server to aggregate voting totals. You'll grab the history on the channel and tally the vote totals.

PubNub PIP Package

pip install pubnub

Tally Votes in Python

from Pubnub import Pubnub

## Init PubNub
pubnub = Pubnub( publish_key="demo", subscribe_key="demo", ssl_on=False )

## Total Votes
last_tt      = 0
total_votes  = 0
vote_chan    = "my_vote_channel"
results_chan = "my_vote_channel.results"

## Tally Callback Function (Sum up the Votes...)
def tally(response):
    print(response)
    total_votes += len(response[0])
    last_tt = response[1]

## Loop Continuously on the last known TIMETOKEN
pubnub.history({ channel : vote_chan, callback : tally, start : last_tt })

## Periodically Publish to the Results Channel 
pubnub.publish({ channel : results_chan, message : { "total" : total_votes } })

Using PubNub History method is the easiest option.