看得教程一头雾水, 只能理解那个自带的 http 请求, 看了很久也没看到有比如数据库查询, 文件处理什么的其他例子, 后来去看看其他教程, 实现倒算是勉强实现了, 但感觉也太复杂了吧? ?

就比如例子中的我假设有个长耗时的任务, 怎么写才会简单点?

import tornado.ioloop
import tornado.web
import time
import _thread


# 模拟耗时任务
def long_work(arg):
    time.sleep(5)
    yield arg * 1024


def mycoroutine(func):
    def wrapper(self):
        gen = func(self)
        work_gen = next(gen)
        def fun():
            result = next(work_gen)
            try:
            	gen.send(result)
            except StopIteration:
            	pass
        _thread.start_new_thread(fun, ())
    return wrapper


class IndexHandler(tornado.web.RequestHandler):
    @tornado.web.asynchronous
    @mycoroutine
    def get(self):
        arg = 10    # 假设请求的参数
        result = yield long_work(arg)
        self.finish(f'<h1>Index {result}</h1>')


class SyncHandler(tornado.web.RequestHandler):
    def get(self):
    	self.write('<h1>SyncHandler</h1>')


def make_app():
    return tornado.web.Application([
        (r'/', IndexHandler),
        (r'/sync', SyncHandler)
    ])


if __name__ == '__main__':
    app = make_app()
    app.listen(8888)
    tornado.ioloop.IOLoop.current().start()