使用 Flask 框架的 Python 代码不起作用，我不知道为什么

科幻人

我从在线教程视频中复制粘贴了代码，但不知何故它不起作用；我的 FlaskProject_1.py 文件中的代码：

    from flask import Flask, render_template
app = Flask(__name__)

posts = [
    {
        'author': 'Corey Schafer',
        'title': 'Blog Post 1',
        'content': 'First post content',
        'date_posted': 'April 20, 2018'
    }
    {
        'author': 'Jane Doe',
        'title': 'Blog Post 2',
        'content': 'Second post content',
        'date_posted': 'April 21, 2018'
    }
]

@app.route("/")
@app.route("/home")
def home():
    return render_template('home.html', posts=posts)

@app.route("/about")
def about():
    return render_template('about.html')

if __name__ == '__main__':     
    app.run(debug=True)

我的 home.html 文件中的代码：

    <!DOCTYPE html>
<html>
<head>
    <title></title>
</head>
<body>
    {% for post in posts %}
        <h1>{{ post.title }}</h1>
        <p>By {{ post.author }} on {{ post.date_posted }}</p>
        <p>{{ post.content }}</p>
    {% endfor %}
</body>
</html>

我的 about.html 文件中的代码：

<!DOCTYPE html>
<html>
<head>
    <title></title>
</head>
<body>
    <h1>About Page</h1>
</body>
</html>

在端口http://127.0.0.1:5000/上使用 CMD 运行代码，这就是我得到的：

E:\IT\Python Projects\Flask Project 01>flask run
 * Serving Flask app 'FlaskProject_1' (lazy loading)
 * Environment: production
   WARNING: This is a development server. Do not use it in a production deployment.
   Use a production WSGI server instead.
 * Debug mode: off
Traceback (most recent call last):
  File "c:\users\sfic man\appdata\local\programs\python\python39\lib\runpy.py", line 197, in _run_module_as_main
    return _run_code(code, main_globals, None,
  File "c:\users\sfic man\appdata\local\programs\python\python39\lib\runpy.py", line 87, in _run_code
    exec(code, run_globals)
  File "C:\Users\Sfic Man\AppData\Local\Programs\Python\Python39\Scripts\flask.exe\__main__.py", line 7, in <module>
  File "c:\users\sfic man\appdata\local\programs\python\python39\lib\site-packages\flask\cli.py", line 990, in main
    cli.main(args=sys.argv[1:])
  File "c:\users\sfic man\appdata\local\programs\python\python39\lib\site-packages\flask\cli.py", line 596, in main
    return super().main(*args, **kwargs)
  File "c:\users\sfic man\appdata\local\programs\python\python39\lib\site-packages\click\core.py", line 1062, in main
    rv = self.invoke(ctx)
  File "c:\users\sfic man\appdata\local\programs\python\python39\lib\site-packages\click\core.py", line 1668, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
  File "c:\users\sfic man\appdata\local\programs\python\python39\lib\site-packages\click\core.py", line 1404, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "c:\users\sfic man\appdata\local\programs\python\python39\lib\site-packages\click\core.py", line 763, in invoke
    return __callback(*args, **kwargs)
  File "c:\users\sfic man\appdata\local\programs\python\python39\lib\site-packages\click\decorators.py", line 84, in new_func
    return ctx.invoke(f, obj, *args, **kwargs)
  File "c:\users\sfic man\appdata\local\programs\python\python39\lib\site-packages\click\core.py", line 763, in invoke
    return __callback(*args, **kwargs)
  File "c:\users\sfic man\appdata\local\programs\python\python39\lib\site-packages\flask\cli.py", line 845, in run_command
    app = DispatchingApp(info.load_app, use_eager_loading=eager_loading)
  File "c:\users\sfic man\appdata\local\programs\python\python39\lib\site-packages\flask\cli.py", line 321, in __init__
    self._load_unlocked()
  File "c:\users\sfic man\appdata\local\programs\python\python39\lib\site-packages\flask\cli.py", line 346, in _load_unlocked
    self._app = rv = self.loader()
  File "c:\users\sfic man\appdata\local\programs\python\python39\lib\site-packages\flask\cli.py", line 402, in load_app
    app = locate_app(self, import_name, name)
  File "c:\users\sfic man\appdata\local\programs\python\python39\lib\site-packages\flask\cli.py", line 256, in locate_app
    __import__(module_name)
  File "E:\IT\Python Projects\Flask Project 01\FlaskProject_1.py", line 23
    {
    ^
SyntaxError: invalid syntax

该http://127.0.0.1:5000/端口只显示“嗯......能不能达到这个page127.0.0.1拒绝连接。” 错误信息。

乔纳森

很可能是因为缺少逗号分隔帖子列表中的两个帖子：

posts = [
    {
        'author': 'Corey Schafer',
        'title': 'Blog Post 1',
        'content': 'First post content',
        'date_posted': 'April 20, 2018'
    }
    {
        'author': 'Jane Doe',
        'title': 'Blog Post 2',
        'content': 'Second post content',
        'date_posted': 'April 21, 2018'
    }
]

应该读：

posts = [
    {
        'author': 'Corey Schafer',
        'title': 'Blog Post 1',
        'content': 'First post content',
        'date_posted': 'April 20, 2018'
    },
    {
        'author': 'Jane Doe',
        'title': 'Blog Post 2',
        'content': 'Second post content',
        'date_posted': 'April 21, 2018'
    }
]

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