mtTkinter allows multithreading with Tkinter, you can get it here: http://tkinter.unpythonic.net/wiki/mtTkinter Just import mtTkinter in place of Tkinter. This will allow you to insert text into a Text widget from multiple threads without conflict. I used it for some instant messaging software I wrote and it works wonderfully.
Request takes a callback method, its async! So I am assuming, by the time the callback is executed the res.end() might get called. Try closing the request within the callback.
In my opinion, deferreds/promises (as you have mentionned) is the way to go, rather than using timeouts. Here is an example I have just written to demonstrate how you could do it using deferreds/promises. Take some time to play around with deferreds. Once you really understand them, it becomes very easy to perform asynchronous tasks. Hope this … Read more
A callback is a function provided by the consumer of an API that the API can then turn around and invoke (calling you back). If I setup a Dr.’s appointment, I can give them my phone number, so they can call me the day before to confirm the appointment. A callback is like that, except … Read more
Note: Most of the answers cover function pointers which is one possibility to achieve “callback” logic in C++, but as of today not the most favourable one I think. What are callbacks(?) and why to use them(!) A callback is a callable (see further down) accepted by a class or function, used to customize the current logic … Read more
When a react component state changes, the render method is called. Hence for any state change, an action can be performed in the render methods body. Is there a particular use case for the setState callback then?
Very simply, a callback needn’t be asynchronous. http://docs.apigee.com/api-baas/asynchronous-vs-synchronous-calls Synchronous:If an API call is synchronous, it means that code execution will block (or wait) for the API call to return before continuing. This means that until a response is returned by the API, your application will not execute any further, which could be perceived by the … Read more
Developers are often confused by what a callback is because of the name of the damned thing. A callback function is a function which is: accessible by another function, and is invoked after the first function if that first function completes A nice way of imagining how a callback function works is that it is … Read more