'Create the journal (the record is automatically created in the process of calling this method) and reprocess the statement'

@api.multi
def create_journal(self):

    statement_import_transient = self.env['account.bank.statement.import'].browse(self.env.context['statement_import_transient_id'])
    return statement_import_transient.with_context(journal_id=self.journal_id.id).import_file()
