Error TypeError: '<=' not supported between instances of 'int' and 'NoneType'

[kaledhananjay]

Hello,

I am new to python and working on the creating client of websocket API. In One function I am getting the error

[b]if 3000 <= code < 4000:

Output:
TypeError: '<=' not supported between instances of 'int' and 'NoneType'[/b]

the complete error is

*********************

Error:
Traceback (most recent call last):
  File "c:\Users\Development\Documents\Python\WebSocket\WebsocketSample_Phython.py", line 577, in <module>
    asyncio.get_event_loop().run_until_complete(functionCall())
  File "C:\Users\Development\AppData\Local\Programs\Python\Python36-32\lib\asyncio\base_events.py", line 468, in run_until_complete
    return future.result()
  File "c:\Users\Development\Documents\Python\WebSocket\WebsocketSample_Phython.py", line 569, in functionCall
    await GetInstruments()
  File "c:\Users\Development\Documents\Python\WebSocket\WebsocketSample_Phython.py", line 453, in GetInstruments
    response = await websocket.recv()
  File "C:\Users\Development\AppData\Local\Programs\Python\Python36-32\lib\site-packages\websockets\protocol.py", line 323, in recv
    raise ConnectionClosed(self.close_code, self.close_reason)
  File "C:\Users\Development\AppData\Local\Programs\Python\Python36-32\lib\site-packages\websockets\exceptions.py", line 147, in __init__
    if 3000 <= code < 4000:
TypeError: '<=' not supported between instances of 'int' and 'NoneType'

*********************

How can I fix this?

Thanks and regards
Dhananjay Kale