过滤器语法格式:{{obj | filter:param}}
django_study.app01.views.py:新建一个template_study_one视图函数
def template_study_one(request):
num1 = 10
num2 = 20
str1 = "suner"
str2 = "karry"
str3 = "suner is the best"
num_list = []
return render(request, "template_study_one.html", locals())
django_study.django_study.urls:绑定url与视图函数
url(r'^template_study_one/$',template_study_one),
在django_study.templates目录下新建template_study_one.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>过滤器</title>
</head>
<body>
<p>两个变量值相加:{{ num1|add:num2 }}</p>
<p>num1变量值加常量100:{{ num1|add:100 }}</p>
<p>两个str变量拼接:{{ str1|add:str2 }}</p>
<p>str1变量拼接固定字符串er:{{ str1|add:"er" }}</p>
<p>str1首字母大写:{{ str1|capfirst }}</p>
<p>str3去除空格显示:{{ str3|cut:"" }}</p>
<p>空列表默认显示:{{ num_list|default:"这是一个空列表" }}</p>
</body>
</html>
启动状态访问:127.0.0.1:8000/template_study_one