Compatibility with Python 2.7

[pierol]

Hi Pawel and thank you for your signalr client library. I'm using it on a pilot IoT project. I notice this:
running the example with Python 2.7 there is a buffering problem.
The chat.client.on('newMessageReceived', print_received_message) will fire after ten message have been sent. After the ten message sent, the "on" is called 10 times. There is a sort of buffering of the messages received.
Using Python3 there isn't the problem. Here my code (that is similar to the example):

from requests import Session
from signalr import Connection
from time import sleep

def main():
   with Session() as session:
    #create a connection
    connection = Connection("https://ws.ingegnosi.cloud/signalr", session)
    #get chat hub
    ws = connection.register_hub('myHub')
    #start a connection
    connection.start()
    print('Connection start ....')

    #create new chat message handler
    def print_received_message(data):
        print(data)

    #create error handler
    def print_error(error):
        print('error: ', error)

    def print_exception(error, args2, args3):
        print('exception: ', error)
        print('exception: ', args2)
        print('exception: ', args3)
        connected = False
        while not connected:
          print('Try to reconnect ....')
          try:
            connection = Connection("https://ws.ingegnosi.cloud/signalr",session)
            ws = connection.register_hub('myHub')
            connection.start()
            print('Connection start ....')
            ws.client.on('accendiLuce', print_received_message)
            connection.error += print_error
            connection.exception += print_exception
            connection.stopping += print_stopping    
            connected = True
          except Exception as e:
            #connection.close()
            print("type error: " + str(e))

    def print_stopping(error):
        print('stopping: ', error)

    ws.client.on('accendiLuce', print_received_message)
    connection.error += print_error
    connection.exception += print_exception
    connection.stopping += print_stopping    

if __name__ == "__main__":
    main()