Trac 1.5.4 and TracMercurial

[anonymous]

Hello,

I know this is about a plugin, but it's a straighforward question about a well-known plugin, so I'm hoping that will make a difference.

Question - Is TracMercurial compatible with python ≥ 3.8 and Trac 1.5.4?

I can use python 3.10 pip to install TracMercurial 1.0.0.11.dev0 to ls /usr/local/lib/python3.10/dist-packages/, but I don't see it as a plugin in the "admin" section of trac, and I get this error in trac.log which I believe to mean that TracMercurial plugin wants python2.

 File "/usr/local/lib/python3.10/dist-packages/TracMercurial-1.0.0.11.dev0-py3.10.egg/tracext/hg/backend.py", line 69
    except ImportError, hg_import_error:
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
SyntaxError: multiple exception types must be parenthesized (backend.py, line 69)
2023-04-21 12:49:39,747 Trac[loader] ERROR: Skipping "hg = tracext.hg.backend": 
Traceback (most recent call last):
  File "/usr/lib/python3.10/cmd.py", line 214, in onecmd
    func = getattr(self, 'do_' + cmd)
AttributeError: 'TracAdmin' object has no attribute 'do_permission'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/local/lib/python3.10/dist-packages/trac/loader.py", line 80, in _load_eggs
    entry.load(require=True)
  File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 2465, in load
    return self.resolve()
  File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 2471, in resolve
    module = __import__(self.module_name, fromlist=['__name__'], level=0)
  File "<frozen importlib._bootstrap>", line 1027, in _find_and_load
  File "<frozen importlib._bootstrap>", line 1002, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 945, in _find_spec
  File "<frozen importlib._bootstrap_external>", line 1439, in find_spec
  File "<frozen importlib._bootstrap_external>", line 1411, in _get_spec
  File "<frozen zipimport>", line 170, in find_spec
 File "<frozen zipimport>", line 689, in _compile_source
  File "/usr/local/lib/python3.10/dist-packages/TracMercurial-1.0.0.11.dev0-py3.10.egg/tracext/hg/backend.py", line 69
    except ImportError, hg_import_error:
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
SyntaxError: multiple exception types must be parenthesized (backend.py, line 69)

It seems strange that I would be able to build and install TracMercurial on python3, yet it won't run on python3.

thank you,

Heather Propes

[Jun Omae]

A duplicate of #13493.