gistfile1.sh

from slackclient import SlackClient
import time

sc = SlackClient('<slack token>')

ts = time.time()

charlie = 'U2JV6D05A'

if sc.rtm_connect():
    while True:
        output_list = sc.rtm_read()
        if output_list and len(output_list) > 0:
            for output in output_list:
                if output and 'user' in output and 'ts' in output:
                    print output['user']
                    if output['user'] == charlie:
                        sc.api_call(
                          "reactions.add",
                          channel=output['channel'],
                          name='unicorn_face',
                          timestamp=output['ts']
                        )
        time.sleep(1)
else:
    print "Connection Failed, invalid token?"