Changes

Author: TomAugspurger

pandas/core/frame.py

@@ -612,9 +612,11 @@ def _repr_html_(self):
             max_rows = get_option("display.max_rows")
             max_cols = get_option("display.max_columns")
             show_dimensions = get_option("display.show_dimensions")
+            classes = ['pandas_notebook']
 
             return self.to_html(max_rows=max_rows, max_cols=max_cols,
-                                show_dimensions=show_dimensions, notebook=True)
+                                show_dimensions=show_dimensions, notebook=True,
+                                classes=classes)
         else:
             return None
 

pandas/io/formats/format.py

@@ -1183,6 +1183,8 @@ def _column_header():
 
         if isinstance(self.columns, MultiIndex):
             template = 'colspan="%d" halign="left"'
+            if 'pandas_notebook' in self.classes:
+                template += ' class="pandas_notebook"'
 
             if self.fmt.sparsify:
                 # GH3547
@@ -1252,6 +1254,8 @@ def _column_header():
                         if records[i] > 1:
                             tags[j] = template % records[i]
                     else:
+                        if 'pandas_notebook' in self.classes:
+                            tags[j] = 'class="pandas_notebook"'
                         continue
                     j += 1
                     row.append(v)