df,e = ek.get_data(my_tbas,my_fields)
my_fields = ["BID", "ASK"]
Please directly contact the Eikon support team via MyRefinitiv and ask for the formula (=TR) that can be used in the Eikon Excel to get the required data.
If the formula is available, it can be applied to the get_data method in the Eikon Data API to retrieve the same data.
Otherwise, you can use the Data Item Browser tool to find the required data. To use the Data Item Browser, please refer to this article.