BUG: formatting of index level names in MultiIndex, per #601

Author: wesm

RELEASE.rst

@@ -112,6 +112,8 @@ pandas 0.7.0
     when sorting by multiple columns
   - Substantially improve performance of DataFrame and Series constructors when
     passed a nested dict or dict, respectively (GH #540)
+  - Modified setup.py so that pip / setuptools will install dependencies (GH
+    #507, various pull requests)
 
 **Bug fixes**
 

pandas/core/index.py

@@ -1112,7 +1112,7 @@ def format(self, space=2, sparsify=True, adjoin=True, names=False):
             level = []
 
             if names:
-                level.append(name if name is not None else '')
+                level.append(str(name) if name is not None else '')
 
             level.extend(np.array(lev, dtype=object).take(lab))
             result_levels.append(level)

pandas/tests/test_index.py

@@ -955,6 +955,12 @@ def test_format(self):
         self.index.format()
         self.index[:0].format()
 
+    def test_format_integer_names(self):
+        index = MultiIndex(levels=[[0, 1], [0, 1]],
+                           labels=[[0, 0, 1, 1], [0, 1, 0, 1]],
+                           names=[0, 1])
+        index.format(names=True)
+
     def test_bounds(self):
         self.index._bounds
 

setup.py

@@ -49,7 +49,7 @@
 
 else:
     setuptools_kwargs = {
-        'install_requires': ['python-dateutil < 2','numpy'],
+        'install_requires': ['python-dateutil < 2', 'numpy'],
     }
     if not _have_setuptools:
         try: