Hi,

Let us take example of Sale Order report. Here is the link of sale_order.py report file

Here is the list of basic arguments specified in the last of above link:

report_sxw.report_sxw('report.sale.order', 'sale.order', 'addons/sale/report/sale_order.rml', parser=order, header="external")

1. 'report.sale.order' is a report name. In sale module report name is sale.order but you have to specify report. compulsorily before report name.
2. 'sale.order' is an object. You need to specify object of report here.
3. 'addons/sale/report/sale_order.rml' is the rml file path.
4. parser=order, in this report file order is a class name. You can see the class in the link above
   class order(report_sxw.rml_parse):
5. header="external". It is optional to write. Headers can be of three types : (1) internal (2) external (3) internal_landscape. These three are defined in Company's Header/Footer part. If you dont want any header you can specify header="False"

You can refer more reporting information here.

Thanks,
www.acespritech.com