Make a web site that asks for a string.  Send that to the server.

The server retrieves the string and uses that as a regex against national names.  It sends back a json object containing a list.  Each list element contains name, population, gdp, map location.

Using a template, display that as a table.  The table should update on every keystroke.

Note the data flow:  
   sql sends a table
   python on the server converts table to json and sends it
   javascript on client gets json and ...

https://www.google.com/search?q=in+python%2Fflask%2C+how+does+one+send+a+list+using+json.++For+each+code+example%2C+show+the+json+it+sends