I want to split name with space and tag_name with underscore. How can I split through jinja templating

Html file:

{% for i in i|split:' ' %}
    <tr>
        <td>
            <p>{{ i }}</p>
        </td>
        <td>
            <p>{{ j }}</p>
         </td>
     </tr>
{% endfor %}

custom_tags.py from django import template register = template.Library()

@register.filter(name='split')
def split(obj, sub_strings):
    list1 = obj.name.split(" ")
    list2 = obj.tag_name.split("_")
    if "" in list1:
        list1.remove("")
    return [list1, list2]

Your template tag isn't splitting based on the variable that you are passing to it, but it seems that isn't necessary as you split by both ' ' and '_'. So you can remove that altogether:

{% for i in i|split %}

@register.filter(name='split')
def split(obj):
    list1 = obj.name.split(" ")
    list2 = obj.tag_name.split("_")
    if "" in list1:
        list1.remove("")
    return [list1, list2]

This gives you a list of two lists, presumably you want to show both because you have {{ i }} and {{ j }}? You just need to move your for loop to be around the <td> elements and not the table row:

<tr>
    {% for i in i|split:' ' %}
         <td>
            <p>{{ i }}</p>
        </td>
    {% endfor %}
</tr>
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