What's new and doc

Author: cpcloud

doc/source/indexing.rst

@@ -249,6 +249,14 @@ new column.
 If you are using the IPython environment, you may also use tab-completion to
 see these accessible attributes.
 
+You can also assign a ``dict`` to a row of a ``DataFrame``:
+
+.. ipython:: python
+
+   x = pd.DataFrame({'x': [1, 2, 3], 'y': [3, 4, 5]})
+   x.iloc[1] = dict(x=9, y=99)
+   x
+
 Slicing ranges
 --------------
 

doc/source/whatsnew/v0.16.1.txt

@@ -132,3 +132,5 @@ Bug Fixes
 - Bug in unequal comparisons between a ``Series`` of dtype `"category"` and a scalar (e.g. ``Series(Categorical(list("abc"), categories=list("cba"), ordered=True)) > "b"``, which wouldn't use the order of the categories but use the lexicographical order. (:issue:`9848`)
 
 - Bug in unequal comparisons between categorical data and a scalar, which was not in the categories (e.g. ``Series(Categorical(list("abc"), ordered=True)) > "d"``. This returned ``False`` for all elements, but now raises a ``TypeError``. Equality comparisons also now return ``False`` for ``==`` and ``True`` for ``!=``. (:issue:`9848`)
+
+- Bug in DataFrame ``__setitem__`` when right hand side is a dictionary (:issue:`9874`)