过滤器：
<!DOCTYPE html>
<html lang="en">
<head><meta charset="UTF-8"><title>Title</title>
</head>
<body>
<h3>int是{{int|add:"2"}}</h3>
<h3>str是{{str|upper }}</h3>
<h3>lst 是{{lst}}</h3>
<h3>lst是{{lst.0 }}</h3>
<h3>dict是{{dict}}</h3>
<h3>dict['a']是{{dict.a}}</h3>
<h3>function是{{func}}</h3>
<h3>class obj是{{classobj.say}}</h3>
</body>
</html>例如标签<h3>{{int|and:"2"}}的代码就是将传入的int值再加2展示
标签<h3>{{str|upper}}的代码就是将传入的str值转为大写展示
模板的继承：
urls:
path('base',views.base_view),path('sport_index',views.sport_view),path('music_index',views.music_view)views.py:
def base_view(request):a = 1b = 2return render(request, 'base.html',locals())def music_view(request):return render(request, 'music.html')def sport_view(request):return render(request, 'sport.html')templates
base.html:
<!DOCTYPE html>
<html lang="en">
<head><meta charset="UTF-8">{% block mytitle %}<title>主页</title>{% endblock %}
</head>
<body>
{{ a}}{{ b }}
<a href="/music_index">音乐频道</a>
<a href="/sport_index">电影频道</a>
<br>{% block info %}<p>这是主页</p>
{% endblock %}<h3>这是底部</h3>
</body>
</html>sport.html
{% extends 'base.html' %}{% block mytitle%}<title>体育频道</title>
{% endblock %}{% block info %}<p>欢迎来到体育频道</p>
{% endblock %}music.html
{% extends 'base.html' %}{% block mytitle %}<title>音乐频道</title>
{% endblock %}{% block info %}<p>欢迎来到音乐频道</p>
{% endblock %}注意：继承父类的模板时，父类的动态参数是无法继承过来的
