#!/usr/bin/env python
# coding: utf-8

# # Eikon Data API - How to use StreamingPrice with events to get News

# ## Imports
# 
# Imports the 'eikon' library and other usefull libraries needed by this notebook

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import eikon as ek
from IPython.display import display, clear_output, HTML
import asyncio

# ## Set App Key
# Set the AppKey of this application and connect to Eikon.

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ek.set_app_key('my app key')


# ### Define a callback to receive incoming events

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def display_news_story(streaming_price, instrument_name, fields):
    clear_output(wait=True)
    print('********** Headline **********')
    display(fields)
    print('********** Story **********')
    html_story = ek.get_news_story(fields['PNAC'])
    display(html_story)


# ## Create a StreamingPrice and register event callbacks

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streaming_price = ek.StreamingPrices(
    instruments = ['NFCP_UBMS'], 
    on_update = lambda streaming_price, instrument_name, fields : 
        display_news_story(streaming_price, instrument_name, fields)
)


# ## Open the StreamingPrice and wait for events

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streaming_price.open()


# ## Close the StreamingPrice when done

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asyncio.get_event_loop().run_until_complete(asyncio.sleep(60))


streaming_price.close()


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