Eikon API Streaming error

daham.lee · April 2021

I followed tutorial as below on Jupyter Notebook.

https://developers.refinitiv.com/en/api-catalog/eikon/eikon-data-api/tutorials#streaming-api-how-to-retrieve-real-time-streaming-prices

streaming_prices = ek.StreamingPrices(

instruments = ['GBP=','JPY=', 'CAD='],

fields = ['CF_BID','CF_ASK','OPEN_PRC', 'CF_HIGH','CF_LOW', 'CF_CLOSE'])

streaming_prices.open()

I got error when I run the code.

streaming_prices.open()

the error message is as below.

2021-04-21 17:01:47,086 P[15720] [WebSocket 0 15960] error from callback <bound method StreamConnection._ws_message of <StreamConnection(WebSocket 0, started daemon 15960)>>: the JSON object must be str, bytes or bytearray, not WebSocketApp

this code works in Pycharm but not in Jupyter Notebook.

could you let me know why does it happen.

Thank you in advance.

umer.nalla · April 2021

Hi @daham.lee

We did have issues with the RDP Library (which shares some code with the Eikon library) in terms of the Websocket versions.

RDP WebSocket hanging when connecting - Forum | Refinitiv Developer Community

If you refer to the above you will note that downgrading the Websocket version resolved the issue.

umer.nalla · April 2021

Hi @daham.lee

I just tried the code here in Jupyter and it is working ok. So, just wonder if it some local difference between Jupyter and Pycharm in libraries/python versions being used?

umer.nalla · April 2021

Hi @daham.lee

If all you are interested in for this script is real-time streaming or snapshot data, then you can also use the RDP Library with a Desktop Session to connect to your Eikon or Workspace.

Discover our Refinitiv Data Platform Library (part 1) | Refinitiv Developers

You can also find several real-time data examples in the Jupyter Notebook form for the RDP library at

Refinitiv-API-Samples/Example.RDPLibrary.Python: Example projects demonstrating access to the Refinitiv Data Platform using the Python Library (github.com)

e.g. 2.3.2 - Content - StreamingPrices - As a cache