Test against Python 3.12 (non-dev) and 3.13 (dev) (#1079)

* Testing against Python 3.12 (non-dev) and Python 3.13 (dev)

* Marking `3.13-dev` tests as failable

* Fixing `test_pickling` tests for Python 3.13.

The `Handler.lock` is substituted for a `nullcontext`, keeping Python 3.13 happy. A no-op stub for `Handler.release` is added, keeping all other Python versions happy.

* Fixing `test_pickling` tests for Python 3.13.

The `Handler.lock` is substituted for a `MockLock`, keeping Python 3.13 happy. A no-op stub for `Handler.release` is added, keeping all other Python versions happy.

.github/workflows/tests.yml

@@ -9,6 +9,7 @@ on:
 jobs:
   tests:
     if: github.event_name != 'pull_request' || github.event.pull_request.head.repo.full_name != github.repository
+    continue-on-error: ${{ endsWith(matrix.python-version, '-dev') }}
     strategy:
       fail-fast: false
       matrix:
@@ -20,7 +21,8 @@ jobs:
         - '3.9'
         - '3.10'
         - '3.11'
-        - 3.12-dev
+        - '3.12'
+        - 3.13-dev
         - pypy-3.9
         include:
         - os: ubuntu-20.04

loguru/_better_exceptions.py

@@ -498,7 +498,7 @@ def _format_exception(
             else:
                 yield from self._indent(introduction + "\n", group_nesting)
 
-        frames_lines = traceback.format_list(frames) + exception_only
+        frames_lines = self._format_list(frames) + exception_only
         if self._colorize or self._backtrace or self._diagnose:
             frames_lines = self._format_locations(frames_lines, has_introduction=has_introduction)
 
@@ -526,5 +526,15 @@ def _format_exception(
             if not is_exception_group(exc) or group_nesting == 10:
                 yield from self._indent("-" * 35, group_nesting + 1, prefix="+-")
 
+    def _format_list(self, frames):
+        result = []
+        for filename, lineno, name, line in frames:
+            row = []
+            row.append('  File "{}", line {}, in {}\n'.format(filename, lineno, name))
+            if line:
+                row.append("    {}\n".format(line.strip()))
+            result.append("".join(row))
+        return result
+
     def format_exception(self, type_, value, tb, *, from_decorator=False):
         yield from self._format_exception(value, tb, is_first=True, from_decorator=from_decorator)

setup.py

@@ -47,6 +47,7 @@
         "Programming Language :: Python :: 3.10",
         "Programming Language :: Python :: 3.11",
         "Programming Language :: Python :: 3.12",
+        "Programming Language :: Python :: 3.13",
         "Programming Language :: Python :: 3 :: Only",
         "Programming Language :: Python :: Implementation :: PyPy",
         "Programming Language :: Python :: Implementation :: CPython",

tests/test_pickling.py

@@ -50,20 +50,30 @@ def _stop(self):
         self.stopped = True
 
 
+class MockLock:
+    def __enter__(self):
+        pass
+
+    def __exit__(self, *excinfo):
+        pass
+
+
 class StandardHandler(logging.Handler):
     def __init__(self, level):
         super().__init__(level)
         self.written = ""
-        self.lock = None
 
     def emit(self, record):
         self.written += record.getMessage()
 
     def acquire(self):
         pass
 
+    def release(self):
+        pass
+
     def createLock(self):  # noqa: N802
-        return None
+        self.lock = MockLock()
 
 
 def format_function(record):