How to convert asynchronous print result output to synchronous output via self.write in Tornado?

Question

Python

Hi all!
Guys, there is an application that spins on Tornado and pulls messages from pubnub.com
The end result displays the necessary messages in the print console, but when you try to transfer the entire array to the browser through write, everything is covered with a basin.

Answer 1

And what error is displayed? It is possible even with traceback.