comtypes runtime error with python 3 packaging

[Antoine Martin]

And it's broken again. comtypes 1.1.5

Related tickets and changesets fixing comtypes problems:

• r18797 + r18798: never include "gen" directory
• r18796 + r14343: silence comtypes, use XPRA_SILENCE_COMTYPES=0 to show diagnostics
• r18790: the network query code that is now broken

• with python 2.7 (OK):

  Could not import comtypes.gen, trying to create it.
  Creating comtypes.gen package failed: [Error 3] The system cannot find the path specified: 'C:\\Program Files\\Xpra\\library.zip\\comtypes\\gen'
  Created a memory-only package.
  Creating writeable comtypes cache directory: 'c:\users\win7pr~1\appdata\local\temp\comtypes_cache\Xpra_cmd-27'
  Using writeable comtypes cache directory: 'c:\users\win7pr~1\appdata\local\temp\comtypes_cache\Xpra_cmd-27'
  Could not import comtypes.gen._565783C6_CB41_11D1_8B02_00600806D9B6_0_1_2: No module named _565783C6_CB41_11D1_8B02_00600806D9B6_0_1_2
  # Generating comtypes.gen._565783C6_CB41_11D1_8B02_00600806D9B6_0_1_2
  Could not import comtypes.gen._00020430_0000_0000_C000_000000000046_0_2_0: No module named _00020430_0000_0000_C000_000000000046_0_2_0
  # Generating comtypes.gen._00020430_0000_0000_C000_000000000046_0_2_0
  Could not import comtypes.gen.stdole: No module named stdole
  # Generating comtypes.gen.stdole
  Could not import comtypes.gen.WbemScripting: No module named WbemScripting
  # Generating comtypes.gen.WbemScripting
  

• with python 3.6:

  Could not import comtypes.gen, trying to create it.
  Creating comtypes.gen package failed: [WinError 5] Access is denied: 'C:\\Program Files\\Xpra\\lib\\comtypes\\gen'
  Created a memory-only package.
  Creating writeable comtypes cache directory: 'C:\Users\WIN7PR~1\AppData\Local\Temp\comtypes_cache\Xpra_cmd-36'
  Using writeable comtypes cache directory: 'C:\Users\WIN7PR~1\AppData\Local\Temp\comtypes_cache\Xpra_cmd-36'
  Could not import comtypes.gen._565783C6_CB41_11D1_8B02_00600806D9B6_0_1_2: No module named 'comtypes.gen._565783C6_CB41_11D1_8B02_00600806D9B6_0_1_2'
  # Generating comtypes.gen._565783C6_CB41_11D1_8B02_00600806D9B6_0_1_2
  Could not import comtypes.gen._00020430_0000_0000_C000_000000000046_0_2_0: No module named 'comtypes.gen._00020430_0000_0000_C000_000000000046_0_2_0'
  # Generating comtypes.gen._00020430_0000_0000_C000_000000000046_0_2_0
  Could not import comtypes.gen.stdole: No module named 'comtypes.gen.stdole'
  # Generating comtypes.gen.stdole
  Error: failed to query network interface:
   No module named 'comtypes.gen.stdole'
  

[Antoine Martin]

Exception details:

get_interface_info({97D5CC41-B8EA-4336-B147-F8227887A3A8})
Traceback (most recent call last):
  File "E:\Xpra\trunk\src/xpra/platform/win32/netdev_query.py", line 18, in get_interface_info
    o = CreateObject("WbemScripting.SWbemLocator")
  File "C:/msys32/mingw32/lib/python3.6/site-packages/comtypes-1.1.5-py3.6.egg/comtypes/client/__init__.py", line 250, in CreateObject
    return _manage(obj, clsid, interface=interface)
  File "C:/msys32/mingw32/lib/python3.6/site-packages/comtypes-1.1.5-py3.6.egg/comtypes/client/__init__.py", line 188, in _manage
    obj = GetBestInterface(obj)
  File "C:/msys32/mingw32/lib/python3.6/site-packages/comtypes-1.1.5-py3.6.egg/comtypes/client/__init__.py", line 112, in GetBestInterface
    interface = getattr(mod, itf_name)
AttributeError: module 'comtypes.gen.WbemScripting' has no attribute 'ISWbemLocator'

The error does not occur on the 64-bit build system. No idea why.

[Antoine Martin]

Not much we can do about this, just use 64-bit builds.

[Antoine Martin]

See also: #2573

[migration script]

this ticket has been moved to: ​https://github.com/Xpra-org/xpra/issues/1899