Qt for Python Development Notes

2019

14. March 2019

- Fixed broken documentation formatting; added deprecation information
- The embedding patch is mostly working, but needs some refinement to be complete:
  - The .pyc generation contradicts the Limited API and must be changed to 
    use source code.
  - The code isolation must be made explicit and complete, so that installers 
    _don't recocnize_ that there is something.
    Right now this was done in the wrong direction.
  Not much code and time necessary, just fixind some bits.

7. March 2019

- Qt for Python 5.12.2 release
 - waiting for final patch before release (PYSIDE-942/PYSIDE-932)
- Setting up test envs for Python 3.7 & 3.5 (so far testing was always done on Python 3.6) -> work in progress
- QML tutorial under review (https://codereview.qt-project.org/#/c/254044/10)
- how to integrate deprecation infos from Qt to the Python side
- Python output to rcc PYSIDE-855
- PYSIDE-95 fixed
- Experimented with MicroPython
- Found the reason for PYSIDE-966: A memory leak was fixed by ctypes.

28. February 2019

- Discussion on adding more python testing environments to be certain 3.5+ versions are properly working.
- PYSIDE-953 fixed
- PYSIDE-934 almost done
- PYSIDE-931 almost done
- refcount bug fixes mathplotlib crashes:
  - PYSIDE-928
  - PYSIDE-937
  - PYSIDE-943
- WIP: Embedding to solve signature problems dependency of support directory since 5.12.1 . Will solve  
  - PYSIDE-942  missing support, PyInstaller  (was solved but involves PyInstaller change)
  - PYSIDE-932  missing support, cx_freese

21. February 2019

- research on how to do ad hoc releases of Pyside 2 for bug fixes like last weeks meta data change (and otherwise no further source change)
- Qt 5.12.2 about to be released -> should have a Qt for Python 5.12.2 release
- discussed installer related crash bug following 5.12.1 release PYSIDE-932 etc.
- tutorials works (based on recent Qt for Python youtube videos)
- prepared discussions with doc team meeting next week (on Python support)
- some more work on PYSIDE-795
- work to distinguish array types from pointer variables
- PYSIDE-946 under development
- PYSIDE-934 void* type handling
- PYSIDE-938 under review
- Current Creator 4.9 beta released today added Python project templates
- PEP 518 (project format for Python projects) -> needs Qt Creator support

14. February 2019

- 5.12.1 wheels had meta data issues and were redone with fixed meta data
- discussed improving the integration of Python example code into Qt for Python docs
- PYSIDE-921
- improved signature matching for custom types
- PYSIDE-816 fixed and merged
- PYSIDE-922 fixed
- PYSIDE-45 fixed
- looking at crashes when importing pandas & numpy (the order of imports matters when working around it)

7. February 2019

- Fixed 5.13 deprecation warnings (which unearthed that we had a dependency on QString::isNull() vs isEmpty() in shiboken)
- Fixed a large number of shiboken code generation warnings (revealing some issues)
- Provided s solution for one issue mentioned at PYSIDE-725 (apparently Sharon Woods from US is involved in some consulting?)
- Will start formal release tag marking in Jira (matching Qt style)
- Data visualization tutorial fixes
- Talking about further integration of existing examples into general docs
- PYSIDE-803 further investigation - no conclusion yet
- PYSIDE-921 fixed
- PYSIDE-816 investigated - fix seems at hand
- PYSIDE-924 fixed issue where Q_PROPERTY flags were not properly passed on to Qt
- restructured cmake files adding a master cmake file (simplifies opening of project in IDEs)
  - Now it's possible to open the whole project (PySide2 + Shiboken2) on QtCreator using the global CMakeList.txt
- worked on issues related to the setup.py and how to execute it.

31. January 2019

- Preparing 5.12.1 release
  - Packages are looking good, likely to be released at same time as Qt 5.12.1 release
- Submitted class bindings of Qt RemoteObjects for PYSIDE-862
- Added classes QWebEngineHistory, WebEngineHistoryItem with required fix PYSIDE-906
- Have calls to method annotated as deprecated issue a warning
- Fixed warnings, prepared Qt 5.13 bindings (based on current 5.13 API additions)
- Looked into PYSIDE-816, PYSIDE-803
- Data visualization tutorial added
- working on ways of substitution of C++ specific terms in docs against Python equivalents (e.g. nullptr and bool)

24. January 2019

- Release branch for 5.12.1 exist
  - There was some issues in CI with 5.12 branch earlier this week and it was pretty much blocked. All issues should be solved now.
- Prepared class bindings of Qt RemoteObject for PYSIDE-862 for review
- Some creativity to keep integrations going due to COIN issues
- Investigation of PYSIDE-803 is ongoing. The issue needs deep analysis to isolate the problem.

17. January 2019

- Fixed PYSIDE-908, further investigation into PYSIDE-803 (free threading)
- QfP 5.12.1 release being prepared
- PYSIDE-797 (uic change ready for review)
- PYSIDE-862 (Qt RemoteObject module support)
- PYSIDE-634 being fixed
- started to look at true cross compilation (PYSIDE-802)
- Improving Qt Creator project template support (QTCREATORBUG-21824)

10. January 2019

- Scope for Qt for Python 5.13 release
  -> relevant tasks marked with Fixversion 5.13 in bugreports.qt.io
  -> feature freeze for Qt for Python 5.13 (April 2019)
- looked into case of corrupted meta data of wheel
- supporting named arguments for signals
- some minimal support in Qt Creator to create a Qt for Python project
- bug hunting in 5.12.0 release
- working on Pyside-797
- further analysis of PYSIDE-803, working on an implementation plan

3. January 2019

- Completed: Complete The Signature Introspection (PYSIDE-510)
- After the release there has been a couple of new reported bugs that we are working on:
 - There was some outdated documentation issue regarding Slots()
 - A couple of issues with multiple inheritance like: PYSIDE-868
 - and with QPlainTextEdit PYSIDE-886
- Restarted investigation of PYSIDE-803

2018

• Qt for Python Development Notes 2018