BUG: workaround when ndarray.__repr__ fails on Index object with unicode values, close #1010

Author: wesm

pandas/core/index.py

@@ -85,6 +85,14 @@ def __new__(cls, data, dtype=None, copy=False, name=None):
     def __array_finalize__(self, obj):
         self.name = getattr(obj, 'name', None)
 
+    def __repr__(self):
+        try:
+            result = np.ndarray.__repr__(self)
+        except UnicodeEncodeError:
+            result = 'Index([%s])' % (', '.join([repr(x) for x in self]))
+
+        return result
+
     def astype(self, dtype):
         return Index(self.values.astype(dtype), name=self.name,
                      dtype=dtype)

pandas/tests/test_multilevel.py

@@ -1241,6 +1241,17 @@ def test_drop_level(self):
         expected = self.frame.ix[[0, 2, 3, 6, 7, 9]].T
         assert_frame_equal(result, expected)
 
+    def test_unicode_repr_issues(self):
+        levels = [Index([u'a/\u03c3', u'b/\u03c3',u'c/\u03c3']),
+                  Index([0, 1])]
+        labels = [np.arange(3).repeat(2), np.tile(np.arange(2), 3)]
+        index = MultiIndex(levels=levels, labels=labels)
+
+        repr(index.levels)
+
+        # NumPy bug
+        # repr(index.get_level_values(1))
+
 if __name__ == '__main__':
 
     # unittest.main()