Unsubscribe Token is not working

Kindly have a look. I just subscribed to one symbol only NIFTY17NOVFUT.
Data keeps coming even after I send a Unsubscribe request.

public void UnSubscribeTicker(string[] arrayTokensToUnSubscribe)
        {
            ticker.UnSubscribe(arrayTokensToUnSubscribe);
        }

public void UnSubscribe(string[] Tokens)
        {
            string msg = "{\"a\":\"unsubscribe\",\"v\":[" + String.Join(",", Tokens) + "]}";
            if (_debug) Console.WriteLine(msg);

            if (IsConnected)
                _ws.Send(msg);
            foreach (string token in Tokens)
            {
                if (token != null)
                {
                    if (_subscribedTokens.ContainsKey(token))
                    {
                        _subscribedTokens.Remove(token);
                        Console.WriteLine("Token UNsubscribed : " + token);
                    }
                }
            }
        }

@tonystark

I am calling below implementation and passing the token array but somehow it is not unsubscribing the token.
After unsubscribing a am again subscribing it using subscribe90 method but is is providing all the token since unsubscribe didn't actually removed the tokens.

Could you please suggest the resolution?

In def on_connect i am setting the wsobject. Is it right way to initialize the ws?

def on_connect(self, ws, response):
self.ws= ws
print("Successfully connected. Response: {}".format(response))
ws.subscribe(self.tokensArray)
ws.set_mode(ws.MODE_LTP, self.tokensArray)
print("Subscribe to tokens in Full mode: {}".format(self.tokensArray))
# return render_template('index2.html')

def unsubscribe(self, instrument_tokens):
"""
Unsubscribe the given list of instrument_tokens.
- `instrument_tokens` is list of instrument_tokens to unsubscribe.
"""
try:
self.ws.sendMessage(
six.b(json.dumps({"a": self._message_unsubscribe, "v": instrument_tokens}))
)
for token in instrument_tokens:
try:
del(self.kws.subscribed_tokens[token])
print("Delete Completed")
except KeyError:
pass
return True
except Exception as e:
self.kws.close(reason="Error while unsubscribe: {}".format(str(e)))
raise


def subscribe(self, instrument_tokens):
"""
Subscribe to a list of instrument_tokens.
- `instrument_tokens` is list of instrument instrument_tokens to subscribe
"""
try:
self.ws.sendMessage(
six.b(json.dumps({"a": self._message_subscribe, "v": instrument_tokens}))
)
for token in instrument_tokens:
self.kws.subscribed_tokens[token] = self.kws.MODE_LTP
return True
except Exception as e:
self.kws.close(reason="Error while subscribe: {}".format(str(e)))
raise