Hello Umashankar,

You can do it with browse method and for loop combination.

Example:

Suppose you have 2 fields as below:

invoice_ids : fields.many2many('sale.order', 'res_sale_inv', 'sale_id', 'inv_id', 'Invoices')

line_ids : fields.one2many('sale.order.line', 'order_id', 'Order Ref')

You can access as per following code:

for rec in self.browse(cr, uid, ids, context=context):

for m_rec in rec.invoice_ids:

print "Name", m_rec.name

for o_rec in rec.line_ids:

print "Name", o_rec.name

Hope this will helps you.

Thanks.