How do you use a simple tag which needs a parameter in django?

Question

In Conjagation Tag part 4 of 4:
Trying to add a simple tag conjugateis in list.html but conjugateis requires a parameter num which I want to be num_elf. I can't find out how to add the parameter so if anyone could help it would be appreciated!
(I know its easy to write conjugateis as a filter and than use a pipe like {{ numelf|conjugateis }} but the code challenge requires conjugateis to be a simple tag.)
```codechallenges/templatetags/fairyextras.py
from django import template
register = template.Library()
@register.simpletag
def conjugateis(num):
    if num == 1:
        return 'is'
    else:
        return 'are'
```
```codechallenges/templates/codechallenges/list.html+jinja
{% load fairy_extras %}
There {% conjugateis({{ numelf }}) %} {{ numelf }} el{{ numelf|pluralize:"f,ves" }}.
```
[MOD: added "+jinja" to markdown formatting to make it pop! -cf]

Chris Freeman · Accepted Answer

You are very close. Don't use parens or tag notation surrounding num_elf. According to the docs (https://docs.djangoproject.com/en/1.9/howto/custom-template-tags/#simple-tags), the argument is listed plainly following the simple_tag:
html+jinja
 {% conjugate_is num_elf %}

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How do you use a simple tag which needs a parameter in django?

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