Deprecate import of pyqt{Signal,Slot,Property}

AnyQt/QtCore.py

@@ -1,3 +1,5 @@
+import warnings
+
 from . import _api
 
 # List names imported from Qt4's QtCore module
@@ -466,3 +468,13 @@ def isdeleted(obj):
 QT_VERSION_INFO = tuple(map(int, qVersion().split(".")[:3]))
 
 _api.apply_global_fixes(globals())
+
+
+def __getattr__(name):
+    if name in ("pyqtSignal", "pyqtSlot", "pyqtProperty"):
+        warnings.warn(
+            f"{name} is deprecated", DeprecationWarning,
+            stacklevel=2,
+        )
+        return globals()[name]
+    raise AttributeError(f"module {__name__} has no attribute {name}")