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Qt for Python Development Notes
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2023
9. March 2023
- General
- Packing use-cases
- Europython CfP: https://ep2023.europython.eu/cfp
- Infra & Releases
- Preparing 5.15.13: release might be today if nothing goes wrong.
- Wheel bundles on the account.qt.io, and soon to be available in the Maintenance Tool
- Bugs & Features
- Re-added QtLocation
- Added larger examples for QtLocation, QtDataVisualization
2. March 2023
- General
- Preparing internal/external material
- Next monday CI maintenance break
- Infra & Releases
- commercial wheel bundles available on account.qt.io
- 6.4.3 release was postponed
- Bugs & Features
- Improvements for qtpip
- postEvent() memory leak still has an unknown origin
- PYSIDE-2236 QMetaMethod.fromSignal added
- PYSIDE-2237 be careful with using reserved words in examples/docs/...
- PYSIDE-2239 opaquecontainers wrong dunder name
- PYSIDE-2206 Examples revamping
- Maybe we keep some examples around even if they are removed in Qt/C++
- Android work continues! looking good with 6.5
- PYSIDE-1564 Multiple inheritance story was improved, still in progress.
23. February 2023
- General
- Giving a talk at Python La Paz (on Saturday) - in Spanish
- Infra & Releases
- 6.4.3 ready to start the release process
- Change to fix the windows signing is merged
- Bugs & Features
- 3.12 compatibility changes will reach 5.15, 6.2, and the future 6.5 LTS
- PYSIDE-79 (caused by PYSIDE-68) refcounting issues addressed
- Continue the 3.12 support because of some new issues found
- PYSIDE-1564: Multiple inheritance support is still being worked (old ABC issues might be related)
- Issues with documentation build (sphinx)
- Research on a memory leak related to the asyncio example: it's not related to asyncio, but from the posting action (pyside, and not Qt, because a C++ example with no async doesn't have any leak)
- PYSIDE-2234 adding QRunnableCreate
- fixed 6.5 issues with cross compilation
- Designer examples revamp
- Works continues on qtpip (a pip wrapper to install commercial wheels)
- PYSIDE-2232 NixOS issues was fixed (another was deferred)
- Research on the std::span support
- Unity compilation research continues
- Bug cleanup, closing and fixing old ones.
- OpenGL getProc issue is being worked on.
- PYSIDE-2192 interactive matplotlib issue (hook)
16. February 2023
- General
- Development of a tool for commercial wheel installation started, and other general improvements.
- Blog posts -> 6.5 release, and Android research.
- Don't forget about Europython.
- Infra & Releases
- Branching dev to 6.5 when the Qt/C++ 6.5.0 RC is out (16 Mar '23)
- Only fixes go to dev with Pick-to: 6.5 if necessary
- new features remain in dev (for 6.6)
- Branching dev to 6.5 when the Qt/C++ 6.5.0 RC is out (16 Mar '23)
- Bugs & Features
- nogil research was positive, and most of our test work. It would require for us to modify the generator for each function/module.
- mandelbrot example works and improves its performance around 3.5 times.
- Python 3.12 will include an incompatibility due to the changes in the type generation
- https://github.com/python/cpython/issues/60074#issuecomment-1430115581
- some other issues were found, but not as critical as the tp_new issue.
- It will be possible to install pyside6 in conda environments starting from 6.4.3 and 6.5
- commercial identifier on commercial wheels will be replaced to be compatible with distutils
- asyncio research continues
- Adapting the deploy tool to include compatibility with android (in progress)
- research on ML-based tool to transform c++ <-> python
- Getting started docs updated
- qtdoc documentation content will be included in the docs
- doc issues: some broken links and references
- General slides to be updated
- nogil research was positive, and most of our test work. It would require for us to modify the generator for each function/module.
09. February 2023
- General
- How to make our API better for pathlib?
- 3.11.2 released, 3.10.10 as well
- https://peps.python.org/pep-0675/
- Infra & Releases
- LTS tags cannot be pushed to community repo (permissions), hopefully in this week.
- Maintenance Tool updates soon
- Binary signing still need a little change to be working
- dev to use 6.5 starting today
- Bugs & Features
- Android research in progress, looking good :)
- A solution was proposed to fix the usage of PySide6 in conda environments: still needs tweaks to work, mainly related to an internal qt.conf that's loaded at runtime.
- PYSIDE-2222 custom widget plugin, load with uic crash
- PYSIDE-2201 was fixed: introducing weak references into the SignalInstances.
- PYSIDE-79 was possible to solve (from PYSIDE-68 solution). Still needs to some documentation to be written.
- PYSIDE-2221 research on future compatibility with NoGIL Python https://github.com/colesbury/nogil https://peps.python.org/pep-0703/
- https://github.com/blueloveTH/pocketpy also interesting
02. February 2023
- General
- Europython 2023 will be in Prague! 17-23 July
- Infra & Release
- Improving wheel creation in our CI (signing windows, and other things)
- Soon we will have released LTS in the OSS repo (after some complications)
- CI Maintenance break coming next Monday (keep an eye open to the Python configuration)
- Bugs & Features
- Unity builds were helping pyside/shiboken, and some tests are being done in qt/c++
- meta task on revamping examples in the Qt Project
- Adding uic functionality and documentation
- Doc reviews, some issues were found
- Android development continues, and looks good!
- introducing --log-level to change --verbose-build and --quiet
- Overhaul of Signal/SignalInstance continues:
- PYSIDE-2201 Weak Reference handling is complete
- PYSIDE-79 Research on Reference bug continues
- create_wheels.py --builddir to explicitly provide build directory
- WIP: QtAsyncIoEventLoop using Qt's event dispatcher, using BaseEventLoop and BaseSelectorEventLoop for guidance
26. January 2023
- Infra & Releases
- Fixed issues with Windows signing
- Bugs & Features
- Fixed PYSIDE-2204 qt.conf encoding
- Fixed bugs in pyside6-metaobjectdump (QML) PYSIDE-2202 , PYSIDE-2203
- PYSIDE-2194: Possibly requires refactoring of QLowEnergyController to use the new WinRT API, instead of COM API
- Android Deployment - Patches incoming to automate cross compilation to produce android wheels
- Overhaul of Signal/SignalInstance
- Implement Weak Reference Handling
- PYSIDE-2201 Handle early destruction of the object better
- PYSIDE-79 Trying to finally fix the reference leak using weakref.
- Alternative approach to Anaconda issue: Register internal qt6.conf with site-packages prefix (still WIP).
- WIP: Implement class QtAsyncIoEventLoop(asyncio.AbstractEventLoop) that wraps around Qt's event loop to enable Qt + asyncio.
- Memory leak with current asyncio example (or space leak?)
19. January 2023
- General
- Hackathon in TQtC
- The WebAssembly PySide Team was almost doubled in size (+1 brain, +1 hand)
- Infra & Releases
- Windows signing to be improved.
- LTS releases into oss repo: some issues appeared but will be merged soon.
- Bugs & Features
- PYSIDE-1994: De-virtualization of Shiboken embedded Python files is now an option controlled dynamically by SBK_EMBED
- PYSIDE-1019: A dormant __feature__ initialization timing problem was fixed while implementing de-virtualization
- PYSIDE-1735: De-coupling of old and new enums was started
- PYSIDE-1564: Debugging of multiple inheritance continues
- Fixed some bluetooth functions in PySide6.
- Low Energy Scanner Example
- PYSIDE-2194: Progressing with this. Definitely a thread issue which allow-thread doesn't seem to fix.
- Possible solution for problems with PySide6 inside conda (compat package with qt6.conf file), but investigating if best solution
- PYSIDE-1994: De-virtualization of Shiboken embedded Python files is now an option controlled dynamically by SBK_EMBED
12. January 2023
- General
- Next week is Hackathon, meeting will be shorter
- Discussion on how to gather information, and sharing material around Qt for Python
- Infra & Releases
- 6.5 RC planning -> feature freeze for PySide
- 6.4.2 was released last Monday
- CMake Jumbo builds issue with Windows signing
- LTS branches to land in pyside-setup soon
- Bugs & Features
- Async examples: addressing memory leak and cpu usage due to the event loop interactions
- Review conda packaging story and PySide6
- De-virtualization of Python files: still some issues
- Incompatibility with pywin32: __feature__ related when trying to check if the ext module uses PySide. Also related to an issue with the inspect module.
- Installing PySide6.support via CMake (was previously not considered)
- Work continues on the multiple inheritance issues related to classes based on QObject
- locate issues related to to* methods
- std::array support in shiboken (still in progress)
- fixing imports in matplotlib examples
- adaptation to 6.5
- splitting shiboken generator source to its own
- Android deployment works - tested on Widget applications
- Fixing QTBUG-109510 leading to discovering issues with certain functions in PySide6. Being fixed.
5. January 2023
- General
- Next monday CI maintenance
- OKRs
- Infra & Releases
- 5.15.12 LTS, 6.2.7 LTS released
- Open Source LTS releases to be moved to the pyside-setup
- 6.4 CI hanging, issues on lts-5.15 due to Python
- 6.4.2 to be release in the following days
- Bugs & Features
- PYSIDE-1931 SQL issue regarding allow-thread
- helping 6.5 translations
- Adaptations with 6.5
- QSharedPointer -> std::shared_ptr attempt
- research on adding std::span into shiboken
- PYSIDE-2160 properties qml types issues
- Tutorials language review
- Android research continues
- QTBUG-109510 BTLE issue on pyside