Merge pull request #968 from ynput/enhancement/804-make-publishattrib…

…utevalues-behave-like-dict-when-iterating

Create Attribute values: Implemented iter

client/ayon_core/pipeline/create/structures.py

@@ -132,6 +132,10 @@ def __getitem__(self, key):
     def __contains__(self, key):
         return key in self._attr_defs_by_key
 
+    def __iter__(self):
+        for key in self._attr_defs_by_key:
+            yield key
+
     def get(self, key, default=None):
         if key in self._attr_defs_by_key:
             return self[key]