I need to know how to create the BUTTON with a TYPE of ACTION?
<button name="%(purchase_requisition.action_purchase_requisition_partner)d" type="action"
string="Request a Quotation" icon="gtk-execute"
attrs="{'invisible': [('line_ids','=',False),('state', 'not in', ('in_progress'))]}"/>
"%(purchase_requisition.action_purchase_requisition_partner)d": where this came from? and how to call the def that you create for this button??