# [begin subscribe_json]
import asyncio
import json
from nats.aio.client import Client as NATS
from nats.aio.errors import ErrTimeout

async def run(loop):
    nc = NATS()

    await nc.connect(servers=["nats://127.0.0.1:4222"], loop=loop)

    async def message_handler(msg):
        data = json.loads(msg.data.decode())
        print(data)

    sid = await nc.subscribe("updates", cb=message_handler)
    await nc.flush()

    await nc.auto_unsubscribe(sid, 2)
    await nc.publish("updates", json.dumps({"symbol": "GOOG", "price": 1200 }).encode())
    await asyncio.sleep(1, loop=loop)
    await nc.close()
# [end subscribe_json]

if __name__ == '__main__':
    loop = asyncio.get_event_loop()
    loop.run_until_complete(run(loop))
    loop.close()