Command line to dump data as plain text files

[CY Lim]

Hello all,

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 that cannot be done with command line, I am happy to use API provided in
C or Python to access the data. Some examples or documentations are
appreciated.

I want to avoid manual parsing of the files, unless what I need is not
doable with the 2 methods above.

Many thanks,
Chee