re-allow dict

Author: jbrockmendel

pandas/core/arraylike.py

@@ -142,6 +142,14 @@ def __add__(self, other):
         elk       2.0   501.5
         moose     3.1   801.5
 
+        Keys of a dictionary are aligned to the DataFrame, based on column names;
+        each value in the dictionary is added to the corresponding column.
+
+        >>> df[["height", "weight"]] + {"height": 0.5, "weight": 1.5}
+               height  weight
+        elk       2.0   501.5
+        moose     3.1   801.5
+
         When `other` is a :class:`Series`, the index of `other` is aligned with the
         columns of the DataFrame.
 

pandas/core/frame.py

@@ -8430,7 +8430,7 @@ def to_series(right):
                 )
 
         elif is_list_like(right) and not isinstance(right, (Series, DataFrame)):
-            if not isinstance(right, (np.ndarray, ExtensionArray, Index, list)):
+            if not isinstance(right, (np.ndarray, ExtensionArray, Index, list, dict)):
                 warnings.warn(
                     f"Operation with {type(right).__name__} are deprecated. "
                     "In a future version these will be treated as scalar-like. "