fix: make _getstate working on Python 3.11

AI-Planning · Jun 6, 2023 · 5530ceb · 5530ceb
1 parent 532b3e0
commit 5530ceb
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/pddl/helpers/cache_hash.py b/pddl/helpers/cache_hash.py
@@ -53,6 +53,9 @@ def _getstate(fn):
     @wraps(fn)
     def __getstate__(self):
         d = fn(self)
+        if d is None:
+            return None
+        # assuming d is a dictionary
         d.pop("__hash", None)
         return d