Jinja {{loop.index}} in Alphabet

[Maxwell_Morais]

@Mohd_RTC21 you can do

{%- for row in doc.child_table -%}
<table width=100% border="1">
	<tr>
	    <td>Sr.</td>
            <td>Name</td>
	</tr>
    <tr>
    	<td>{{   chr( (64 + loop.index) % 90 )  }}</td>
        <td>{{ row.test_name }}</td>
    </tr>
</table>
{%- endfor -%}