Python 3.12 support

[grigi]

Hi, I was testing the brand-new-released Py3.12 on common libraries I use, and green is failing to run tests with the following error:

Traceback (most recent call last):
  File "/mnt/old/home/grigi/work/magneto/.pyenv/bin/green", line 8, in <module>
    sys.exit(main())
             ^^^^^^
  File "/mnt/old/home/grigi/work/magneto/.pyenv/lib/python3.12/site-packages/green/cmdline.py", line 89, in main
    return _main(argv, testing)
           ^^^^^^^^^^^^^^^^^^^^
  File "/mnt/old/home/grigi/work/magneto/.pyenv/lib/python3.12/site-packages/green/cmdline.py", line 12, in _main
    args = config.mergeConfig(args, testing)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/mnt/old/home/grigi/work/magneto/.pyenv/lib/python3.12/site-packages/green/config.py", line 677, in mergeConfig
    config = getConfig(getattr(args, "config", default_args.config))
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/mnt/old/home/grigi/work/magneto/.pyenv/lib/python3.12/site-packages/green/config.py", line 648, in getConfig
    read_func = getattr(parser, "read_file", getattr(parser, "readfp"))
                                             ^^^^^^^^^^^^^^^^^^^^^^^^^
AttributeError: 'ConfigParser' object has no attribute 'readfp'. Did you mean: 'read'?

It appears to be related to this change: https://docs.python.org/3.12/whatsnew/3.12.html#configparser

Running the tests with python -m unittest works as expected.

[sodul]

I'm able to run tests with python 3.12.0 but I get a new warning.

import unittest

class DurationTestCase(unittest.TestCase):

    def test_pass(self):
        pass

And with Green we get:

> green test_vanilla.py
.

Captured stderr for test_vanilla.DurationTestCase.test_pass
/Users/stephane/.pyenv/versions/3.12.0/lib/python3.12/unittest/case.py:580: RuntimeWarning: TestResult has no addDuration method
  warnings.warn("TestResult has no addDuration method",

Ran 1 test in 0.221s using 10 processes

OK (passes=1)

@CleanCut I can probably take a look over the long weekend but if you are around I would like to discuss a few things:

• get a new release out from the current main since there are some changes in the codebase.
• drop support for python 3.7. It is deprecated and most folks have now dropped support for it. It will help because there is some logic for threads that changed in 3.8 and it confuses pylint/mypy.
• improve the type annotation. I actually started this in a local branch but ran into issues with the pre-3.8 logic. It did discover getattr() bugs similar to the one reported here.

[sodul]

This is not necessarily what I would PR, but this patch got the warnings to go away with Python 3.12.0:

--- result.py.orig      2023-11-28 12:33:02
+++ result.py   2023-11-28 12:41:44
@@ -172,6 +172,7 @@
         self.stderr_errput = OrderedDict()
         self.stream = stream
         self.colors = colors
+        self.collectedDurations = []

     def recordStdout(self, test, output):
         """
@@ -224,6 +225,17 @@
                 )
             )
             del self.stderr_errput[test]
+
+    def addDuration(self, test, elapsed):
+        """
+        Called when a test finished to run, regardless of its outcome.
+
+        Args:
+            test: The test case corresponding to the test method.
+            elapsed: The time represented in seconds, including the
+                execution of cleanup functions.
+        """
+        self.collectedDurations.append((str(test), elapsed))

 class ProtoTestResult(BaseTestResult):
@@ -255,6 +267,7 @@
     def reinitialize(self):
         self.shouldStop = False
         self.errors = []
+        self.collectedDurations = []
         self.expectedFailures = []
         self.failures = []
         self.passing = []
@@ -399,6 +412,7 @@
         self.shouldStop = False
         self.testsRun = 0
         # Individual lists
+        self.collectedDurations = []
         self.errors = []
         self.expectedFailures = []
         self.failures = []

Posting here so others can get unstuck while a new release can get published with a full fix.

[CleanCut]

@sodul Cool! Feel free to open up a PR. 👍

[CleanCut]

Sidenote: Sorry for the delay(s) in my response(s). I'm going through some major life changes at the moment which are consuming all of my time. I'll try to check in more often, and I welcome all the help I can get.