多用于返回html代码片段
示例：
templatetags/my_inclusion.py
from django import template
register = template.Library()
@register.inclusion_tag('result.html')
def show_results(n):
n = 1 if n < 1 else int(n)
data = ["第{}项".format(i) for i in range(1, n+1)]
return {"data": data}
templates/snippets/result.html
<ul>
{% for choice in data %}
<li>{{ choice }}</li>
{% endfor %}
</ul>
templates/index.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="x-ua-compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>inclusion_tag test</title>
</head>
<body>
{% load inclusion_tag_test %}
{% show_results 10 %}
</body>
</html>
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