Add a list helper to create unique list of dictionaries and tests for it.

src/corelibs/iterator_handling/list_helpers.py

@@ -2,6 +2,7 @@
 List type helpers
 """
 
+import json
 from typing import Any, Sequence
 
 
@@ -44,4 +45,26 @@ def is_list_in_list(
     # Get the difference and extract just the values
     return [item for item, _ in set_a - set_b]
 
+
+def make_unique_list_of_dicts(dict_list: list[Any]) -> list[Any]:
+    """
+    Create a list of unique dictionary entries
+
+    Arguments:
+        dict_list {list[Any]} -- _description_
+
+    Returns:
+        list[Any] -- _description_
+    """
+    try:
+        # try json dumps, can fail with int and str index types
+        return list({json.dumps(d, sort_keys=True, ensure_ascii=True): d for d in dict_list}.values())
+    except TypeError:
+        # Fallback for non-serializable entries, slow but works
+        unique: list[Any] = []
+        for d in dict_list:
+            if d not in unique:
+                unique.append(d)
+        return unique
+
 # __END__