[Python] Tornado with cgi form

*I installed tornado and he is functional, but when I execute the following
script:*


import tornado.ioloop
import tornado.web
import cgi


class MainHandler(tornado.web.
RequestHandler):


form = cgi.FieldStorage() # parse form data
print('Content-type: text/html\n') # hdr plus blank line
print('<title>Reply Page</title>') # html reply page
if not 'user' in form:
print('<h1>Who are you?</h1>')
else:
print('<h1>Hello <i>%s</i>!</h1>' %
cgi.escape(form['user'].value))


application = tornado.web.Application([
(r"/", MainHandler),
])


if __name__ == "__main__":
application.listen(8888)
tornado.ioloop.IOLoop.instance().start()


*In the terminal have these outputs:*


python test.py
Content-type: text/html


<title>Reply Page</title>
<h1>Who are you?</h1>


*When I call the browser on localhost:8888, the message is this:*


405: Method Not Allowed
*
**Please, can someone have a idea about why the error occurs? and what I
need to do to fix this?*