Support Python 3.14.

Author: johnzhou721

.github/workflows/main.yml

@@ -20,7 +20,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu, windows, macos-x86_64, macos-arm64]
-        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12", "3.13"]
+        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12", "3.13", "3.14-dev"]
         qt-version: ["pyside2", "pyside6", "pyqt5", "pyqt6"]
         include:
           - os: ubuntu
@@ -42,6 +42,8 @@ jobs:
             qt-version: pyside2
           - python-version: "3.13"
             qt-version: pyside2
+          - python-version: "3.14-dev"
+            qt-version: pyside2
           # pyside6 and pyqt6 require python >=3.9
           - python-version: "3.8"
             qt-version: pyside6

qasync/__init__.py

@@ -830,29 +830,30 @@ def wrapper(*args, **kwargs):
 
     return outer_decorator
 
-
-class QEventLoopPolicyMixin:
-    def new_event_loop(self):
-        return QEventLoop(QApplication.instance() or QApplication(sys.argv))
-
-
-class DefaultQEventLoopPolicy(
-    QEventLoopPolicyMixin,
-    asyncio.DefaultEventLoopPolicy,
-):
-    pass
-
-
 @contextlib.contextmanager
-def _set_event_loop_policy(policy):
-    old_policy = asyncio.get_event_loop_policy()
-    asyncio.set_event_loop_policy(policy)
+def _use_qeventloop(loop_factory):
+    app = QApplication.instance() or QApplication([sys.argv])
+    if loop_factory is None:
+        loop = QEventLoop(app)
+    else:
+        loop = loop_factory(app)
+    try:
+        old_loop = asyncio.get_event_loop()
+    except RuntimeError:  # No current event loop
+        old_loop = None
+    asyncio.set_event_loop(loop)
     try:
-        yield
+        yield loop
     finally:
-        asyncio.set_event_loop_policy(old_policy)
-
+        loop.close()
+        asyncio.set_event_loop(None)
 
-def run(*args, **kwargs):
-    with _set_event_loop_policy(DefaultQEventLoopPolicy()):
-        return asyncio.run(*args, **kwargs)
+# A run function matching the signature of asyncio.run
+def run(main_coro, *, debug=None, loop_factory=None):
+    """
+    Run the given coroutine using a QEventLoop.
+    """
+    with _use_qeventloop(loop_factory) as loop:
+        if debug is not None:
+            loop.set_debug(debug)
+        return loop.run_until_complete(main_coro)