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@tserenbat.uyanga Thanks for your question - unfortunately the Eikon Data API get_news_headlines call only provides Headline search queries at this time.
I will pass your suggestion over to the product owner.
Company trees don't match in Eikon online tool and the Eikon Proxy API
How can I retrieve all available option RICs for a given underlying with python API
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News providers' codes
Searching for bonds with specific criteria using Python