#692: Python 3.9 on v2 installer breaks part of stdlib -----------------------+---------------------------- Reporter: akominlsfi | Owner: osgeo4w-dev@… Type: defect | Status: new Priority: major | Component: Installer Version: | Resolution: Keywords: | -----------------------+----------------------------
Comment (by akominlsfi): Regarding the patching of dll directories I found this [https://www.python.org/dev/peps/pep-0648/ PEP #648] for site customizations, which seems to be what osgeo4w packaging could benefit a lot from (each package that gets installed and needs for example shared dlls could add their respective script to the directory). Since that PEP is still a draft, sitecustomize or a custom .pth file/files (using [https://docs.python.org/3/library/site.html site module]) could be way to go for now regarding the patching of dll directories? Location of these could be in site-packages or next to the `apps/python37/python.exe`. Creating a venv without the `--system-site-packages` flag needs the patching anyway if stdlib dlls are not duplicated (for ssl and sqlite3 to work), so the customization could be done always by using the exe path. This change should preserve the current usage (osgeo4w shell, python- qgis.bats, anything else?) and also the python environment would work now as a standalone installation directly from the exe that just happens to include a lot of stuff in system site-packages without any special preset environment needed before execution. \\ Side note: It could also help if the QGIS install added a .pth file to the site-packages. The module is currently resolved by the wrapper bat extending PYTHONPATH to include `apps/qgis/python`, but since `import qgis` now works if its found at all even if the wrapper bat is not used (fixed [https://github.com/qgis/QGIS/pull/43345 here]), it could be used as if it was a normal site-package in the python environment with the help of a .pth file pointing to the module path. -- Ticket URL: <https://trac.osgeo.org/osgeo4w/ticket/692#comment:1> OSGeo4W <http://trac.osgeo.org/osgeo4w> OSGeo4W is the Windows installer and package environment for the OSGeo stack.
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