《Flask Web开发实例3-5为何总报错

Z时代
2024-01-10
分类：技术分享

我阅读了《Flask Web开发》实例3-5疑问，并将其代码复制到自己的电脑上，但是还是报错。
user.html

{% extends "bootstrap/base.html" %}
{% block title %}Flasky{% endblock %}
{% block navbar %}
<div class="navbar navbar-inverse" role="navigation">
    <div class="container">
        <div class="navbar-header">
            <button type="button" class="navbar-toggle"
            data-toggle="collapse" data-target=".navbar-collapse">
                <span class="sr-only">Toggle navigation</span>
                <span class="icon-bar"></span>
                <span class="icon-bar"></span>
                <span class="icon-bar"></span>
            </button>
            <a class="navbar-brand" href="/">Flasky</a>
        </div>
        <div class="navbar-collapse collapse">
            <ul class="nav navbar-nav">
                <li><a href="/">Home</a></li>
            </ul>
        </div>
    </div>
</div>
{% endblock %}
{% block content %}
<div class="container">
    <div class="page-header">
        <h1>Hello,{{ name }}!</h1>
    </div>
</div>{% endblock %}

index.html

<h1>Hello World!</h1>

base.html

<html>
<head>
         {% block head %}
         <title>{% block title %}{% endblock %} - My Application</title>
         {% endblock %}
</head>
<body>
         {% block body %}
         {% endblock %}
</body></html>

Hello.py

from flask_bootstrap import Bootstrap
from flask_script import Manager     
from flask import Flask
from flask import render_template
app = Flask(__name__)
bootstrap = Bootstrap(app)
manager = Manager(app)
@app.route('/')
def index():
    return render_template('index.html')
@app.route('/user/<name>')
def user(name):
    return render_template('user.html', name=name)
if __name__ == '__main__':    manager.run()

但是运行出来却是这个样子：
《Flask Web开发实例3-5为何总报错
想问问为什么