Tornado V6 Seems To Have Dropped Tornado.web.asynchronous Coroutine. Any Different Way Of Fixing This In Code?

Migrated torando v5.1 to v6. but asynchronous coroutine seems to have removed. Any suggestions for its fix? Migrating the project from 2.7 to 3.6, at the same time moving tornado f

Solution 1:

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).

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.