Python Flask，模板，Jinja2模板，模板变量，过滤器

谁借莪１个温暖的怀抱￠ 2022-04-01 11:27 268阅读 0赞

**demo.py（模板变量，过滤器）：**

# coding:utf-8
    
    from flask import Flask, render_template  # 导入render_template
    
    
    app = Flask(__name__)
    
    
    @app.route("/index")
    def index():
        data = {
            "name": "python",
            "age": 18,
            "my_dict": {"city": "sz"},
            "my_list": [1, 2, 3, 4, 5],
            "my_int": 0
        }
        # 渲染模板
        return render_template("index.html", **data)  # 模板变量以键值对的形式传。 (Django中直接传字典，Flask需要拆包)
    
    
    if __name__ == '__main__':
        app.run(debug=True)

**templates/index.html（模板）：**

<!DOCTYPE html>
 <html lang="en">
 <head>
 <meta charset="UTF-8">
 <title>模板</title>
 </head>
 <body>
 
 name = {
 { name }}
 age = {
 { age }}
 my_dict: city= {
 { my_dict["city"] }}
 my_dict: city= {
 { my_dict.city }} 
 my_list: {
 { my_list }} 
 my_list[my_int]: {
 { my_list[my_int] }} 
 my_list[0] + my_list[1] = {
 { my_list[0] + my_list[1] }} 
 {
 {"hello" + " python" }} 
 
 a{
 {" flask world " | trim | upper }}a 
 {
 { "hello" | safe }} 
 
 </body>
 </html>

### 字符串过滤器 ###

**safe****：禁用Html转义；**

\{ \{ 'hello' | safe \}\}

**capitalize****：把变量值的首字母转成大写，其余字母转小写；**

\{ \{ 'hello' | capitalize \}\}

**lower****：把值转成小写；**

\{ \{ 'HELLO' | lower \}\}

**upper****：把值转成大写；**

\{ \{ 'hello' | upper \}\}

**title****：把值中的每个单词的首字母都转成大写；**

\{ \{ 'hello' | title \}\}

**trim****：把值的首尾空格去掉；**