use WeakMethod from weakref

client/ayon_core/lib/events.py

@@ -8,7 +8,6 @@ import logging
 import weakref
 from uuid import uuid4
 
-from .python_2_comp import WeakMethod
 from .python_module_tools import is_func_signature_supported
 
 
@@ -18,7 +17,7 @@ class MissingEventSystem(Exception):
 
 def _get_func_ref(func):
     if inspect.ismethod(func):
-        return WeakMethod(func)
+        return weakref.WeakMethod(func)
     return weakref.ref(func)
 
 

client/ayon_core/lib/python_2_comp.py

@@ -1,44 +1,17 @@
+# Deprecated file
+# - the file container 'WeakMethod' implementation for Python 2 which is not
+#   needed anymore.
+import warnings
 import weakref
 
 
-WeakMethod = getattr(weakref, "WeakMethod", None)
+WeakMethod = weakref.WeakMethod
 
-if WeakMethod is None:
-    class _WeakCallable:
-        def __init__(self, obj, func):
-            self.im_self = obj
-            self.im_func = func
-
-        def __call__(self, *args, **kws):
-            if self.im_self is None:
-                return self.im_func(*args, **kws)
-            else:
-                return self.im_func(self.im_self, *args, **kws)
-
-
-    class WeakMethod:
-        """ Wraps a function or, more importantly, a bound method in
-        a way that allows a bound method's object to be GCed, while
-        providing the same interface as a normal weak reference. """
-
-        def __init__(self, fn):
-            try:
-                self._obj = weakref.ref(fn.im_self)
-                self._meth = fn.im_func
-            except AttributeError:
-                # It's not a bound method
-                self._obj = None
-                self._meth = fn
-
-        def __call__(self):
-            if self._dead():
-                return None
-            return _WeakCallable(self._getobj(), self._meth)
-
-        def _dead(self):
-            return self._obj is not None and self._obj() is None
-
-        def _getobj(self):
-            if self._obj is None:
-                return None
-            return self._obj()
+warnings.warn(
+    (
+        "'ayon_core.lib.python_2_comp' is deprecated."
+        "Please use 'weakref.WeakMethod'."
+    ),
+    DeprecationWarning,
+    stacklevel=2
+)