Raise error when iterating over patch objects.

plotly · Apr 24, 2023 · c0246a2 · c0246a2
1 parent 69b3d5d
commit c0246a2
Show file tree

Hide file tree

Showing 2 changed files with 11 additions and 0 deletions.
diff --git a/dash/_patch.py b/dash/_patch.py
@@ -99,6 +99,9 @@ def __ior__(self, other):
         self.update(E=other)
         return _noop
 
+    def __iter__(self):
+        raise TypeError("Iterating over patch objects is prohibited.")
+
     def append(self, item):
         """Add the item to the end of a list"""
         self._operations.append(_operation("Append", self._location, value=item))

diff --git a/tests/unit/test_patch.py b/tests/unit/test_patch.py
@@ -255,3 +255,11 @@ def test_pat020_patch_pickle():
     q = pickle.loads(data)
 
     assert patch_to_dict(p) == patch_to_dict(q)
+
+
+def test_pat021_patch_iter():
+    p = Patch()
+
+    with pytest.raises(TypeError):
+        for _ in p["invalid"]:
+            print("invalid iteration")