How to get data from child table using jinja in print format

2

below code is child table item in sales invoice…

<table class="table table-condensed cart no-border">
	<thead>
		<tr>
                        <th width="2%">{{ _("Sr.") }}</th>
			<th width="46%">{{ _("Item") }}</th>
                       	<th width="13%" class="text-right">{{ _("Batch No") }}</th>
                       	<th width="9%" class="text-right">{{ _("MRP") }}</th>
		</tr>
	</thead>
	<tbody>
		{% set totalqty = { 'total':0 } %}
		{%- for item in doc.items -%}
		<tr>

	<td>{{loop.index}}</td>
			<td>
			{{ item.item_name }}
			</td>
                        <td class="text-right">{{ item.batch_no }}</td>
			<td class="text-right">{{ item.get_formatted("price_list_rate") }}</td>
                      	
		</tr>
		
		{%- endfor -%}
		
<tr><td colspan=6></td</td>
	</tbody>
</table>