ENH: change to tree-like MultiIndex output with > 2 levels, GH #689

wesm · wesm · commit 05b2789775bc · 2012-01-26T19:02:14.000-05:00
diff --git a/pandas/core/index.py b/pandas/core/index.py
@@ -2070,8 +2070,7 @@ def _sparsify(label_list):
             if p == t:
                 sparse_cur.append('')
             else:
-                result.append(cur)
-                break
+                sparse_cur.append(t)
 
         prev = cur
 
