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Python, Threads & Qt: Boom!

We will investigate problems and pitfalls that will occur when using threads & Qt together inside a Python application, including unexpected memory corruption and crashes.

Abstract

Quick introduction to Python & Qt: PySide/PyQt 
Threading in Python & Qt: QThread, QRunnable, QFuture 
Thread-safety and re-entrancy of QObjects & QWidgets 
Inter-thread signals & slots 
Event loops & long-running tasks 
Memory corruption bugs in PySide & PyQt

Teijo Holzer

Teijo has been working professionally with Python for more than 15 years, the majority of that time in the Visual Effects Industry. He has detailed knowledge about the core Python interpreter and strong experience in working with massively concurrent algorithms, both on a system level & UI level.

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The New Zealand Python User Group (NZPUG) aims to foster an inclusive community which invites diverse groups of people from all backgrounds, regardless of age, body size, race, gender, gender identity and expression, sexuality, disability or religion to discuss and learn about all things Python in an environment of mutual respect, tolerance and encouragement.
— Code of Conduct of New Zealand Python User Group
 

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Schedule Kiwi PyCon X 2019
Overview
Friday
Workshops/Tutorials
Dave Glover: a) Python Debugging: Pro Tips and Not-So-Obvious Tricks / b) Django in the Cloud
Steve Dunford: A Beginners Intro to the Flask Web Framework
Travis Holton: Managing Rolling Updates with Ansible
Tristan Bunn: Processing.py -- Creative Coding with Python
CodeWars
Saturday
Conference Opening (A1 9:00)
Presentations (by time & place)
Keynote: Amber Brown (A1 9:20)
Alex Raichev: Python for Public Transport (A1 11:00)
Barrie Duncan: Python product dev tools for electronics (A2 11:00)
Anna Tisch: How to Write Python Code Others Like to Use (A1 11:50)
Rounak Vyas: Parallelism in Python (A2 11:50)
Glenn Ramsey: Getting started with MicroPython on a microcontroller (A1 13:30)
Curtis Maloney: Ever wanted to better understand metaclasses? (A2 13:30)
Fei Long Wang: The journey of building a production-ready managed Kubernetes service (A1 14:20)
Wing Kin Chan: Let everyone enjoy your videos with Python (A2 14:20)
Tom Eastman: Using Python, Django, and ruthlessness to protect people from social media harassment (A1 15:30)
Graham Dumpleton: Building an interactive training environment using JupyterHub (A2 15:30)
Steve Dunford: From Pascal to Python (A1 16:20)
Phoenix Zerin: Automate Your Integration Tests Using pytest-docker-compose (A2 16:20)
Conference Dinner / Python Pub Quiz (18:30)
Sunday
Presentations (by time & place)
Keynote: Daniel Roy Greenfeld (A1 9:00)
Katie McLaughlin: Turning 'wat' into 'why' (A1 10:40)
Teijo Holzer: Python, Threads & Qt: Boom! (A2 10:40)
Lightning Talks & Prize Giving (A1 from 11:00 with a break for lunch)
Amar Verma: Aircraft predictive maintenance using Python/ML (A1 14:20)
Clinton Roy: The Packaging Lifecycle with Poetry (A2 14:20)
Simon Merrick: Python: A Medley of Programming Paradigms (A1 15:30)
Agnetha Korevaar: Build and hack your own IoT with MQTT (A2 15:30)
Conference Closing (A1 16:10)
Inclusivity at Kiwi PyCon X 2019
Inclusivity at Kiwi PyCon X
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