https://github.com/fluentpython/asyncio-tkinter

Example of running asyncio on top of the Tcl/Tk event loop via Tkinter
https://github.com/fluentpython/asyncio-tkinter

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Example of running asyncio on top of the Tcl/Tk event loop via Tkinter

• Host: GitHub
• URL: https://github.com/fluentpython/asyncio-tkinter
• Owner: fluentpython
• Created: 2015-03-18T18:18:13.000Z (over 9 years ago)
• Default Branch: master
• Last Pushed: 2015-04-05T20:12:21.000Z (over 9 years ago)
• Last Synced: 2024-08-01T22:56:19.336Z (3 months ago)
• Language: Python
• Size: 2.25 MB
• Stars: 65
• Watchers: 9
• Forks: 14
• Open Issues: 5
• Metadata Files:
  • Readme: README.rst

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README

        
==========================

Using asyncio with Tkinter

==========================

The ``tkapp.py`` and ``tkapp2.py`` examples in this folder demonstrate:

- using an alternative ``asyncio.BaseEventLoop`` subclass on top of the Tkinter event loop;

- leveraging futures and ``yield from`` to escape *callback hell*;

- applying the ``asyncio`` abstractions to GUI programming instead of network programming.

History

=======

The code is adapted from Dino Viehland's (@DinoV) talk `Using futures for async GUI programming in Python 3.3 `_ presented at PyCon US 2013. Dino's example used Tulip because the first release of ``asyncio`` was not available then; some APIs changed later and the ``tkapp.py`` was not working with Python 3.4 and ``asyncio`` from the standard library.

Luciano Ramalho (@ramalho) updated this code to run with Python 3.4 with help and encouragement from Guido van Rossum (@gvanrossum). See relevant thread in the `python-tulip `_ group.

Ramalho also wrote the ``tkapp2.py`` which makes it easier to run the three demonstrations from Viehland's talk: sequential processing, asynchronous with callbacks and asynchronous with coroutines.

Alan Cristhian (@AlanCristhian) fixed the hang-on-exit bug by turning the ``asyncio`` event loop thread into a daemon; see ``guievents.py``, method ``GuiEventLoop._start_io_event_loop``.