Odoo is the world's easiest all-in-one management software. It includes hundreds of business apps:
CRM | e-Commerce | Accounting | Inventory | PoS | Project management | MRP | etc.
good start is here:
from here, i would avoid using sxw part...
instead.. i use direct rml coding (and simply call report parser...)
rml guide : http://www.reportlab.com/docs/rml2pdf-userguide.pdf
or : http://www.reportlab.com/docs/rml-for-idiots.pdf
hope this helps a bit