运行出错sre_constants.error: missing ),

import json
import os
import tornado.web
import tornado.ioloop
import tornado.options
import tornado.httpserver
from tornado.web import RequestHandler, url, StaticFileHandler
from tornado.options import define, options
define("port", default=8000, type=int)
class IndexHandler(RequestHandler):
def get(self):
self.write('<a href="/itcast">itcast</a>')
class ItcastHandler(RequestHandler):
def get(self):
self.write(dict(a=1, b=2))
settings={
'static_path': os.path.join(os.path.dirname(__file__), "static"),
'debug': True,
}
if __name__ == "__main__":
tornado.options.parse_command_line()
current_path = os.path.dirname(__file__)
app = tornado.web.Application(handlers=[
(r"/itcast", ItcastHandler),
(r"/(.*）", StaticFileHandler, {"path": os.path.join(current_path, "static/html"),
"default_filename": "index.html"}),
], **settings)
http_server = tornado.httpserver.HTTPServer(app)
http_server.listen(options.port)
tornado.ioloop.IOLoop.current().start()