Question

我正在尝试学习如何使用python web框架Tornado。我已经熟悉了烧瓶，但到目前为止，我甚至难以开始使用简单的应用程序。我的目录结构如下：

应用
- 静态
- 模板
  - Testing.html -app.py

我在app.py中的代码很简单：

define("port", default=5000, help="run on the given port", type=int)

class Application(tornado.web.Application):
    def __init__(self):
        handlers = [
            (r"/", MainHandler),
        ]
        settings = dict(
            template_path=os.path.join(os.path.dirname(__file__), "templates"),
            static_path=os.path.join(os.path.dirname(__file__), "static"),
            debug=True,
        )
        super(Application, self).__init__(handlers, **settings)

class MainHandler(tornado.web.RedirectHandler):
    def get(self):
        self.render("Testing.html")

if __name__ == "__main__":
    http_server = tornado.httpserver.HTTPServer(Application())
    http_server.listen(options.port)
    tornado.ioloop.IOLoop.current().start()

然而，当我运行app.py时出现错误：

ERROR:tornado.application:Uncaught exception
Traceback (most recent call last):
File "/vt/release/dist/3p/anaconda/lib/python2.7/site-packages/tornado/http1connection.py", line 238, in _read_message
delegate.finish()
File "/vt/release/dist/3p/anaconda/lib/python2.7/site-packages/tornado/httpserver.py", line 289, in finish
self.delegate.finish()
File "/vt/release/dist/3p/anaconda/lib/python2.7/site-packages/tornado/web.py", line 2047, in finish
self.execute()
File "/vt/release/dist/3p/anaconda/lib/python2.7/site-packages/tornado/web.py", line 2067, in execute
**self.handler_kwargs)
File "/vt/release/dist/3p/anaconda/lib/python2.7/site-packages/tornado/web.py", line 187, in __init__
self.initialize(**kwargs)

TypeError: initialize() takes at least 2 arguments (1 given)

这是为什么？我应该提一下，在我尝试连接之前，它不会给我错误。

Answer 1

您的MainHandler应该继承自RequestHandler，而不是RedirectHandler。

（详细信息：RedirectHandler需要两个参数，＆＃34; self＆＃34;和＆＃34; target_path＆＃34;。您在Application .__ init__中的处理程序列表中指定目标路径。既然你如果在处理程序列表中没有第二个参数，并且您从RedirectHandler继承错误，则Tornado会获得异常。）

运行简单的Python Tornado应用程序时初始化错误

1 个答案: