Command line to dump data as plain text files

[Plutocrat]

gnucash-user-request at gnucash.org wrote on Sunday, 16 April, 2017 08:48 PM:
> I cannot seem to find how to use command line to dump data from GnuCash
> into a single or multiple plain text files (e.g. csv). Any suggestion will
> be helpful.

If you're using sqlite or mysql as the backend, you could use the database client (mysql or sqlite3) to extract and dump data with SQL queries? I guess Python would have tools for interacting with a database too. 
If you're using the XML backend its a bit more complicated. 

P.