[Pyrex] How to deal with Obtaining char * from temporary Python value ?

[Mateusz Korniak]

I have python class Item which has many string atributes like name, 
description etc...

I would like to pass  it to my C written core so I have written pyrex 
interface file:

iface.pyx :
def add_item(item):
	c_add_item(item.id,item.name,item.groups,item.name_ascii,
		item.groups_ascii,item.description
		,item.url,item.graph_url,item.price_brutto,item.price_netto)

But I get error: Obtaining char * from temporary Python value

I am aware that I can't rely on that char * , but first thing I do in 
c_add_item is copy contents of all ptrs, and take care of allocaton issues.

How should I solve such problem ?
TIA, regards
-- 
Mateusz Korniak
"Black holes are where God divided by zero." - Steven Wright