log_format.py

#!/usr/bin/env python2.7

import json
import sys

try:
    log = json.loads(sys.stdin.read())
except:
    print "Couldn't parse."

    sys.exit(1)

for message in log:
    try:
        print "%s %s: %s" % (message["date"], message["from"]["name"],
                message["message"])
        print
    except:
        print "Couldn't print message from %s" % message["from"]["name"]