[GNC-dev] Import of prices in CSV files

Hello,

I would like to use a custom (bank-provided) CSV-file containing the 
prices for some of my securities to fill the price database.
Unfortunately, I couldn't find a good source of information to do that 
with GnuCash itself (yet). If there's a proper way to do so, I'd be 
grateful for any advice.
If that is not possible out-of-the-box, I had a first draft for using 
the 'piecash' module for doing so (which seems not to handle the source 
definition of the price properly, and reports 'invalid' though).

What I am looking for is either a recommended approach for this or maybe 
hints on how to make sure that I don't break anything with it and keep 
my book and overall data intact.

Thanks a lot in advance!

Best regards,
Thomas