partial list-like indexing

Author: jreback

pandas/indexes/interval.py

@@ -412,11 +412,8 @@ def _convert_list_indexer(self, keyarr, kind=None):
         included in the categories
         """
         locs = self.get_indexer(keyarr)
-        # TODO: handle keyarr if it includes intervals
-        if (locs == -1).any():
-            raise KeyError("a list-indexer must only include "
-                           "existing intervals")
-
+        check = locs == -1
+        locs = locs[~check]
         return locs
 
     def _check_method(self, method):

pandas/tests/indexing/test_interval.py

@@ -61,8 +61,7 @@ def f():
 
         self.assertRaises(KeyError, f)
 
-        # this is a bit different than other .loc indexing
-        def f():
-            df.loc[[10, 4]]
-
-        self.assertRaises(KeyError, f)
+        # partial missing
+        result = df.loc[[10, 4]]
+        expected = df.iloc[4:6]
+        tm.assert_frame_equal(result, expected)