<para style="P8">[[ repeatIn(get_journal(data['form']['period_id'][0],data['form']['partner_id'][0]),'j') ]]</para>

Odoo give an error 

"form" while evaluating"repeatIn(get_journal(data['form']['period_id'][0],data['form']['partner_id'][0]),'j')"<type
'exceptions.ValueError'>,"form" while evaluating"repeatIn(get_journal(data['form']['period_id'][0],data['form']['partner_id'][0]),'j')",<traceback object at 0x7f0eb75f4e60>