Psycopg2 doesn't install on Python 3.13 alpha

[junepark678]

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If you have a question, such has "how do you do X with Python/PostgreSQL/psycopg2" please write to the mailing list or open a question instead.

Before opening this ticket, please confirm that:

• I am running the latest version of pip, i.e. typing pip --version you get this version.
• I have read the installation documentation and the frequently asked questions
• If install failed, I typed pg_config on the command line and I obtained an output instead of an error.

Please complete the following information:

• OS: Linux (6.8.5-zen1-1-zen) on Arch Linux
• Psycopg version: 2.9.9
• Python version: 3.13.0a6+ (heads/main:6dc661bc9f)
• PostgreSQL version: 16.2
• pip version: 24.0

[hroncok]

psycopg2/psycopg/utils.c

Lines 395 to 397 in a971c11

	#if PY_VERSION_HEX >= 0x03080000
	/* tested with Python 3.8.0a2 */
	return _PyInterpreterState_Get() == PyInterpreterState_Main();

This function was made public and was renamed to PyInterpreterState_Get in Python 3.13.0a1+ in python/cpython#106321

[befeleme]

And after a rename of the function, this is the test run:

======================================================================
FAIL: test_cidr_adapt (tests.test_ipaddress.NetworkingTestCase.test_cidr_adapt)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/builddir/build/BUILD/psycopg2-2.9.9/tests/test_ipaddress.py", line 112, in test_cidr_adapt
    self.assertEquals(cur.fetchone()[0], '::ffff:102:300/128')
    ~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AssertionError: '::ffff:1.2.3.0/128' != '::ffff:102:300/128'
- ::ffff:1.2.3.0/128
?         ^ ^ ^
+ ::ffff:102:300/128
?         ^ ^ ^


======================================================================
FAIL: test_inet_adapt (tests.test_ipaddress.NetworkingTestCase.test_inet_adapt)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/builddir/build/BUILD/psycopg2-2.9.9/tests/test_ipaddress.py", line 71, in test_inet_adapt
    self.assertEquals(cur.fetchone()[0], '::ffff:102:300/128')
    ~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AssertionError: '::ffff:1.2.3.0/128' != '::ffff:102:300/128'
- ::ffff:1.2.3.0/128
?         ^ ^ ^
+ ::ffff:102:300/128
?         ^ ^ ^

Apparently, the textual representation of addresses has changed: python/cpython@f22bf8e

[dvarrazzo]

Can you provide a MR with the function renamed, and a change to the tests to accept both the results?

Thank you very much 🙂