DSD | Better accuracy models | Machine Learning library

This will get your single element list to be just a value

To clarify, what you're asking here is not “how to set attributes” but “how to include attributes when converting (or ‘writing’) an SDMX DataSet to a pandas DataFrame”.

Using sdmx1,¹ see the documentation for the attribute parameter to the write_dataset() function. This is the function that is ultimately called by to_pandas() when you pass a DataSet object as the first argument.

In your sample code, the key line is:

This is a pretty complex and interesting question from an operations point of view. The answer depends on a few things.

1. How much control do you have over the execution of this process?
2. Is "yesterday" guaranteed, or does the process need to work if "last execution date" is not yesterday?
3. What should happen if the process is run twice today?

The best practices way to solve this is to have a dataset (or table) that stores the last execution date. That allows you to handle #2 trivially, and the answer to #3 might guide exactly how you store this but is easily handled anyway.

Say for example you have a table, MetaAC.LastExecDate (or, in spanish, MetaAC.UltimaFecha or similar). It could store things this way:

PICTURE is used to create a FORMAT, not an INFORMAT.

The ANYDTDTM informat should handle strings in that style. But it will ignore the fractions of a second.

The following is an expression, with two uses of the comma operator:

1. Create an array and index it by years rather than default 1:n

2. Loop through your array starting at year+1 and set to missing

In this code, the second client must wait for the first client to finish before the server processes its request. This is not what i want.

Are you running two clients from different tabs in the same browser? If so, that sequencing is not the fault of your server, but is the browser deciding to wait for the first request to finish before sending a second identical request (in hopes of using a cached value).

Your first code is the correct way to code it. The second code block is just coded wrong as the asynchronous database result is not available yet when you try to send the result. You can't code that way with asynchronous callbacks.

How can i modify this code in order that the query are executed in parallele and the res.send wait for the query response?

The first code block is the way to write your Express code. There's nothing wrong with it. If two requests are getting serialized, then it's either happening on the client or in the database, not in your Express code.

EDIT: I was able to get the WITS bilateral trade flows directly through the URL on the API documentation page. See also Parsing XML to DATA FRAME

The resulting code looks like so: