How to Unsubscribe Symbol from WebSocket?

[raaxus]

Documentation mentions the Subscription for any Symbol / ticker by mentioning "task":"mw"

How can i unsubscribe for any symbol? what should be the task value?

[vishant]

@dheepi Checkout this thread that might help.

[Ashok]

@vishant I did exactly the same... and Yes I tried during market hours.

Below is my snippet

## WebSocket
from smartapi import WebSocket
import greenstalk
import json
from datetime import datetime

atFile  = open('/opt/kite/abToken.fi','r')
atData  = json.loads(atFile.read())

tQ          = greenstalk.Client(('127.0.0.1', 11300))
FEED_TOKEN  = atData['feedToken']
CLIENT_CODE = 'xxxxxx'
token       = 'nse_cm|2885&nse_cm|1594&nse_cm|11536'

ss = WebSocket(FEED_TOKEN, CLIENT_CODE)

def on_tick(ws, tick):
    print("Ticks: {}".format(tick))

    for i in tick:
        ts          = datetime.now() 
        i['sysTS']  = ts.strftime('%Y-%m-%d %H:%M:%S.%f')
        i['scr']    = 'NFO'
        tickJson    = json.dumps(i)
        tQ.put(tickJson)

    for i in tick:
        if 'hb' in i['task']:
            print(i['ak'])
        
def on_connect(ws, response):
    ws.send_request(token)
    print(ws)

def on_close(ws, code, reason):
    ws.stop()

# Assign the callbacks.
ss.on_ticks = on_tick
ss.on_connect = on_connect
ss.on_close = on_close

ss.connect( )

[vishant]

Hi @dheepi ,

Have you tried passing the correct value for the token which is mentioned in Doc?
FYI: multiple token subscriptions will be as mentioned below:

token="nse_cm|2885&nse_cm|1594&nse_cm|11536"

Also, are you trying to get tick data during market hours / post-market hours? (Post-market hours you won't get any data)

[Ashok]

@vishant Thanks. Even before that I am struck with Python SDK and WS streaming. I did exactly like the sample code, but only getting heartbeats. Could you help me with the format of the token to pass?

I am getting only below output;

Ticks: [{'ak': 'nk', 'msg': 'cn', 'task': 'cn'}]
Ticks: [{'ak': 'nk', 'msg': 'mw', 'task': 'mw'}]
Ticks: [{'ak': 'nk', 'msg': 'hb', 'task': 'hb'}]
Ticks: [{'ak': 'nk', 'msg': 'hb', 'task': 'hb'}]
Ticks: [{'ak': 'nk', 'msg': 'hb', 'task': 'hb'}]
Ticks: [{'ak': 'nk', 'msg': 'hb', 'task': 'hb'}]
Ticks: [{'ak': 'nk', 'msg': 'hb', 'task': 'hb'}]

[vishant]

Hi @dheepi ,

As per their Documentation there seems no functionality available to subscribe & unsubscribe on the fly.
One possible solution I have applied to overcome this issue is to disconnect the existing ws connection & re-establish a new connection. (Though it's not the perfect one, but on temporary basis it's doable )
The exact solution is to have a subscribe & unscubscribe methods to be available for any script.

Thanks
vishant

[Ashok]

@vishant
There should be a way to dynamically subscribe/un-subscribe ws feed for a token. Use case is: If I am watching a future derivative of a a index/EQ and want to enter a option position. After entering a option position, I need to watch the tick data of that option to dynamically set my SL/Target or exit.
I can subscribe to all option data of that derivative, but that will be overkill and unnecessarily process unwanted data and wastes CPU cycles at both the ends.

BR
Dheepika

[vishant]

Hi @raaxus ,

Could you please explain more? What are you trying to achieve?