Merge pull request #6112 from y-p/PR_GH6098

BUG: HTMLFormatter does not die on unicode frame GH6098

Author: y-p

doc/source/release.rst

@@ -155,6 +155,7 @@ Bug Fixes
   - Regression in ``.get(None)`` indexing from 0.12 (:issue:`5652`)
   - Subtle ``iloc`` indexing bug, surfaced in (:issue:`6059`)
   - Bug with insert of strings into DatetimeIndex (:issue:`5818`)
+  - Fixed unicode bug in to_html/HTML repr (:issue:`6098`)
 
 pandas 0.13.0
 -------------

pandas/core/format.py

@@ -767,7 +767,7 @@ def _column_header():
                                                          levels)):
                 name = self.columns.names[lnum]
                 row = [''] * (row_levels - 1) + ['' if name is None
-                                                 else str(name)]
+                                                 else com.pprint_thing(name)]
 
                 tags = {}
                 j = len(row)

pandas/tests/test_format.py

@@ -719,6 +719,14 @@ def test_to_html_index_formatter(self):
 </table>"""
         self.assertEquals(result, expected)
 
+    def test_to_html_regression_GH6098(self):
+        df = DataFrame({u('clé1'): [u('a'), u('a'), u('b'), u('b'), u('a')],
+                           u('clé2'): [u('1er'), u('2ème'), u('1er'), u('2ème'), u('1er')],
+                           'données1': np.random.randn(5),
+                           'données2': np.random.randn(5)})
+        # it works
+        df.pivot_table(rows=[u('clé1')], cols=[u('clé2')])._repr_html_()
+
     def test_nonunicode_nonascii_alignment(self):
         df = DataFrame([["aa\xc3\xa4\xc3\xa4", 1], ["bbbb", 2]])
         rep_str = df.to_string()