Merge pull request #3079 from jreback/minor

DOC/CLN: cookbook addition, minor cleaning in internals.py

Author: jreback

doc/source/cookbook.rst

@@ -99,6 +99,12 @@ Grouping
 `Create multiple aggregated columns
 <http://stackoverflow.com/questions/14897100/create-multiple-columns-in-pandas-aggregation-function>`__
 
+Splitting
+~~~~~~~~~
+
+`Splitting a frame
+<http://stackoverflow.com/questions/13353233/best-way-to-split-a-dataframe-given-an-edge/15449992#15449992>`__
+
 Timeseries
 ----------
 

pandas/core/internals.py

@@ -795,14 +795,6 @@ def __nonzero__(self):
     def ndim(self):
         return len(self.axes)
 
-    def is_mixed_dtype(self):
-        counts = set()
-        for block in self.blocks:
-            counts.add(block.dtype)
-            if len(counts) > 1:
-                return True
-        return False
-
     def set_axis(self, axis, value):
         cur_axis = self.axes[axis]
         value = _ensure_index(value)

pandas/tests/test_internals.py

@@ -238,10 +238,10 @@ def test_attrs(self):
         self.assertEquals(len(self.mgr), len(self.mgr.items))
 
     def test_is_mixed_dtype(self):
-        self.assert_(self.mgr.is_mixed_dtype())
+        self.assert_(self.mgr.is_mixed_type)
 
         mgr = create_blockmanager([get_bool_ex(['a']), get_bool_ex(['b'])])
-        self.assert_(not mgr.is_mixed_dtype())
+        self.assert_(not mgr.is_mixed_type)
 
     def test_is_indexed_like(self):
         self.assert_(self.mgr._is_indexed_like(self.mgr))