Backend Error Failed to Deserialize backend Response

vijay.shah · December 2019

I am facing the same problem as mentioned in this thread. https://community.developers.refinitiv.com/questions/29948/eikon-data-api-backend-error-failed-to-deserialize.html

pierre.faurel suggestion to use single quotes ' ' does not generate errors but the response is empty unlike the NEWS monitor app in EIKON desktop application.

It is also surprising the high quality EIKON tutorial series uses below syntax which is also generate errors. https://developers.refinitiv.com/eikon-apis/eikon-data-api/learning?content=15351&type=learning_material_item

q = "Product:IFREM AND Topic:ISU AND Topic:EUB AND (\"PRICED\" OR \"DEAL\")"

Jirapongse · December 2019

@vijay.shah

Yes, you are correct. The code in the tutorial returns an error. I will contact the product team to verify it.

The solution that I can think of is using the triple backslashes to escape the double-quotes.

from datetime import date

start_date, end_date = date(2016, 1, 1), date.today()
q = "Product:IFREM AND Topic:ISU AND Topic:EUB AND (\\\"PRICED\\\" OR \\\"DEAL\\\")"
headlines = ek.get_news_headlines(query=q, date_from=start_date, date_to=end_date, count=100)
headlines.head()

vijay.shah · December 2019

jirapongse.phuriphanvichai,

This works fine, thanks for quick response. I found below syntax is slightly more concise and also works without errors...

q = r'Product:IFREM AND Topic:ISU AND Topic:EUB AND (\"PRICED\" OR \"DEAL\")'

Christiaan Meihsl · December 2019

@vijay.shah jirapongse.phuriphanvichai,

The following is even simpler, and works fine (tested in a Python Notebook, the result is not empty):

q = 'Product:IFREM AND Topic:ISU AND Topic:EUB AND (PRICED: OR DEAL:)'

vijay.shah · December 2019

@Christiaan Meihsl Christiaan Meihsl very cool, did not know this is allowed.

Backend Error Failed to Deserialize backend Response

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