龙卷风v6似乎已删除tornado.web.asynchronous协程.在代码中解决此问题的任何其他方法? [英] tornado v6 seems to have dropped tornado.web.asynchronous coroutine. any different way of fixing this in code?

问题描述

将torando v5.1迁移到v6.但异步协程似乎已删除.有任何修复建议吗?

Migrated torando v5.1 to v6. but asynchronous coroutine seems to have removed. Any suggestions for its fix?

由于此[

Migrating the project from 2.7 to 3.6, at the same time moving tornado framework from v5.1 to v6.0.2 due to the bug suggested in this [Python code for DynamoDB query is working on v3.6 but not working in python 2.7 strackoverflow thread.

在安装v6龙卷风之后，它以以下错误中断.

After installing v6 tornado it is breaking with below error.

Python3 xxxx.py

Traceback (most recent call last):
  File "XXXX.py", line 200, in <module>
    class MainHandler(tornado.web.RequestHandler):
  File "XXXX.py", line 201, in MainHandler
    @tornado.web.asynchronous
AttributeError: module 'tornado.web' has no attribute 'asynchronous'

进入 https://github.com/mher/flower/issues/878

Come across https://github.com/mher/flower/issues/878 thread facing the same issue. is there a fix for this? or any alternative way of presenting things in code?

推荐答案

@asynchronous处理程序在5.1中已弃用，在6.0中已删除.

The @asynchronous handler was deprecated in 5.1 and removed in 6.0. Instead of using @asynchronous and callbacks, you should use coroutines (using either @tornado.gen.coroutine or async def).

请注意，一些较旧的代码示例曾经在同一方法上同时具有@asynchronous和@coroutine.将@asynchronous放在协程上没有任何作用，因此，如果您碰巧同时使用了两个装饰器，则只需删除@asynchronous即可，而无需进行其他任何更改.

Note that a few older code examples used to have both @asynchronous and @coroutine on the same method. Putting @asynchronous on a coroutine doesn't do anything, so if you happen to be using both decorators you can just remove @asynchronous without changing anything else.

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