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question

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Syntax for screener

Hi Team,

I use this formula in screener, now I am trying to replace the "HK" here with a pre-defined items.

Economic_Sector,err = ek.get_data('SCREEN(U(IN(Equity(active,public,primary))/*UNV:Public*/), IN(TR.ExchangeCountryCode,"HK"), CURN=USD)',

'TR.TRBCEconomicSector',

{'Sdate':start_date,'Scale':scale,'Curn':curn})

For example:

I set country_code='HK'

and put the country_code into the formula, like this:

Economic_Sector,err = ek.get_data('SCREEN(U(IN(Equity(active,public,primary))/*UNV:Public*/), IN(TR.ExchangeCountryCode, country_code ), CURN=USD)',

'TR.TRBCEconomicSector',

{'Sdate':start_date,'Scale':scale,'Curn':curn})


Do you have idea why it doesnt work and how should I correct this.

Here is the error message:

KeyError                                  Traceback (most recent call last)
<ipython-input-24-b53aff9d8165> in <module>
      9 Economic_Sector,err = ek.get_data('SCREEN(U(IN(Equity(active,public,primary))/*UNV:Public*/), IN(TR.ExchangeCountryCode,"country_code"), CURN=USD)',
     10                     'TR.TRBCEconomicSector',
---> 11                    {'Sdate':start_date,'Scale':scale,'Curn':curn})
     12      13 Economic_Sector 
~\Anaconda3\lib\site-packages\refinitiv\dataplatform\legacy\data_grid.py in get_data(instruments, fields, parameters, field_name, raw_output, debug, raw_response)
    206         return result
    207 --> 208     return get_data_frame(result, field_name)
    209     210 
~\Anaconda3\lib\site-packages\refinitiv\dataplatform\legacy\data_grid.py in get_data_frame(data_dict, field_name)
    255         headers = [header.get('field', header.get('displayName')) for header in data_dict['headers'][0]]
    256     else:
--> 257         headers = [header['displayName'] for header in data_dict['headers'][0]]
    258     data = numpy.array([[get_data_value(value) for value in row] for row in data_dict['data']])
    259     if len(data):

KeyError: 'headers'


Thanks!


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1 Answer

Upvotes
Accepted
15.1k 28 8 12

Hello @Danni.Qiu

You cannot mix the string 'SCREEN(U(IN(Equity(active,public,primary))/*UNV:Public*/), IN(TR.ExchangeCountryCode, country_code ), CURN=USD)' with the variable country_code like that. You need to concatenate the string to the country_code variable first like the following:

country_code='HK'

syntax = 'SCREEN(U(IN(Equity(active,public,primary))/*UNV:Public*/), IN(TR.ExchangeCountryCode, %s ), CURN=USD)'%(country_code)

Economic_Sector,err = ek.get_data(syntax,'TR.TRBCEconomicSector')

There are many ways to concatenate string, please see more details in the following Python tutorial websites:

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Thank you so much!