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Opened 4 years ago

Closed 4 years ago

Last modified 17 months ago

#1878 closed task (fixed)

python 3.7 support

Reported by: Antoine Martin Owned by: Antoine Martin
Priority: critical Milestone: 2.4
Component: platforms Version:
Keywords: Cc:

Description (last modified by Antoine Martin)

Python 3.7 is due to be released soon: Python 3.7.0rc1, there are a number of things we can take advantage of, some may allow us to drop existing workarounds.

The most interesting features:

Change History (7)

comment:1 Changed 4 years ago by Antoine Martin

Eventually, it would be nice to be able to compile with the new buffer interface and avoid deprecation warnings like #1884.

In the meantime:

  • r19908 silences the deprecation warnings
  • r19909 switches to python 3.7 on win32 (now the default with msys2)

New problem: OpenGL_accelerate doesn't build - see #1883.

comment:2 Changed 4 years ago by Antoine Martin

Milestone: 3.02.4
Priority: majorblocker
Status: newassigned

There's a major blocker with cx_freeze, once again falling flat on its face.
Looks like it does not support python 3.7 yet, and this also affects pyinstaller: zipimport.ZipImportError: can't find module 'encodings'.

$ ./Xpra_cmd.exe attach tcp:
Fatal Python error: init_sys_streams: can't initialize sys standard streams
zipimport.ZipImportError: can't find module 'io'

Moving the missing modules by hand into the "library.zip" doesn't really help and the resulting executable still fails with:

$ ./Xpra_cmd.exe attach tcp:
zipimport.ZipImportError: can't find module '__startup__'

BTW, those modules were already hard-coded in setup.py to workaround existing cx_freeze breakage:

            #hopefully, cx_Freeze will fix this horror:
            #(we shouldn't have to deal with DLL dependencies)
            import site
            lib_python = os.path.dirname(site.getsitepackages()[0])
            lib_dynload_dir = os.path.join(lib_python, "lib-dynload")
            add_data_files('', glob.glob("%s/zlib*dll" % lib_dynload_dir))
            for x in ("io", "codecs", "abc", "_weakrefset", "encodings"):
                add_data_files("lib/", glob.glob("%s/%s*" % (lib_python, x)))

That's amongst a few other workarounds (base_prefix, numpy, etc)

comment:3 Changed 4 years ago by Antoine Martin

Description: modified (diff)
Priority: blockercritical

cx_freeze can be fixed with this patch: Compilation correct .pyc files for Python 3.7.0

Created a mingw ticket for this: cx_Freeze for python3.7 needs a patch - bytecode is unusable

Last edited 4 years ago by Antoine Martin (previous) (diff)

comment:4 Changed 4 years ago by Antoine Martin

Resolution: fixed
Status: assignedclosed

The MSYS2 package has been updated with the patch and we have workarounds for the rest.

comment:5 Changed 4 years ago by Antoine Martin

One of the few noisy deprecation warnings left is from https://github.com/pyparsing/ (fixed in 2.2.1 - Fix collections ABCs deprecation warning).

comment:6 Changed 4 years ago by Antoine Martin

comment:7 Changed 17 months ago by migration script

this ticket has been moved to: https://github.com/Xpra-org/xpra/issues/1878

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