Test failures with Python 3.12.0b1:AttributeError: type object 'VCRHTTPConnection[…]' has no attribute 'debuglevel'

[mgorny]

When running the test suite against Python 3.12.0b1, I get a lot of failures from integration tests, they seem to roughly boil down to the same thing:

_____________ ERROR at setup of test_matchers[uri-http://httpbin.org/get?p1=q1&p2=q2-http://httpbin.org/get?p2=q2&p1=q1] ______________

tmpdir = local('/tmp/pytest-of-mgorny/pytest-3/test_matchers_uri_http___httpb0')
httpbin = <pytest_httpbin.serve.Server object at 0x7f39ca56e5d0>
httpbin_secure = <pytest_httpbin.serve.SecureServer object at 0x7f39c9c6d520>

    @pytest.fixture
    def cassette(tmpdir, httpbin, httpbin_secure):
        """
        Helper fixture used to prepare the cassette
        returns path to the recorded cassette
        """
        default_uri = _replace_httpbin(DEFAULT_URI, httpbin, httpbin_secure)
    
        cassette_path = str(tmpdir.join("test.yml"))
        with vcr.use_cassette(cassette_path, record_mode=vcr.mode.ALL):
>           urlopen(default_uri)

tests/integration/test_matchers.py:24: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
/usr/lib/python3.12/urllib/request.py:212: in urlopen
    _opener = opener = build_opener()
/usr/lib/python3.12/urllib/request.py:593: in build_opener
    opener.add_handler(klass())
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

self = <urllib.request.HTTPHandler object at 0x7f39c9c6d7f0>, debuglevel = None

    def __init__(self, debuglevel=None):
>       self._debuglevel = debuglevel if debuglevel is not None else http.client.HTTPConnection.debuglevel
E       AttributeError: type object 'VCRHTTPConnection/tmp/pytest-of-mgorny/pytest-3/test_matchers_uri_http___httpb0/test.yml' has no attribute 'debuglevel'. Did you mean: 'set_debuglevel'?

/usr/lib/python3.12/urllib/request.py:1255: AttributeError

I'm guessing that __getattr__() doesn't work here (because stuff's being called from a "type object"?).

Full log: py312.log

[mgorny]

The following cheap hack seems to resolve it:

diff --git a/vcr/stubs/__init__.py b/vcr/stubs/__init__.py
index 54ce470..3e0b21b 100644
--- a/vcr/stubs/__init__.py
+++ b/vcr/stubs/__init__.py
@@ -171,6 +171,8 @@ class VCRHTTPResponse(HTTPResponse):
 class VCRConnection:
     # A reference to the cassette that's currently being patched in
     cassette = None
+    debuglevel = HTTPSConnection.debuglevel
+    _http_vsn = HTTPSConnection._http_vsn
 
     def _port_postfix(self):
         """

However, there is probably a better way of resolving this.

[mgorny]

Gentle ping.

[jairhenrique]

@mgorny can you help us by submitting a PR with python 3.12 support in CI?

[mgorny]

@mgorny can you help us by submitting a PR with python 3.12 support in CI?

Sure, done that in #754. That said, that tox.ini is true horror.