Change docs

Author: phofl

doc/source/whatsnew/v1.2.0.rst

@@ -235,6 +235,7 @@ Other enhancements
 - Improve error reporting for :meth:`DataFrame.merge()` when invalid merge column definitions were given (:issue:`16228`)
 - Improve numerical stability for :meth:`Rolling.skew()`, :meth:`Rolling.kurt()`, :meth:`Expanding.skew()` and :meth:`Expanding.kurt()` through implementation of Kahan summation (:issue:`6929`)
 - Improved error reporting for subsetting columns of a :class:`DataFrameGroupBy` with ``axis=1`` (:issue:`37725`)
+- Implement method ``cross`` for :meth:`DataFrame.merge` and :meth:`DataFrame.join` (:issue:`5401`)
 
 .. ---------------------------------------------------------------------------
 

pandas/core/frame.py

@@ -225,6 +225,9 @@
       join; preserve the order of the left keys.
     * cross: creates the karthesian product from both frames, preserves the order
       of the left keys.
+      
+      .. versionadded:: 1.2.0
+
 on : label or list
     Column or index level names to join on. These must be found in both
     DataFrames. If `on` is None and not merging on indexes then this defaults