278     def sortvalue(self, rowindex, colindex):

   278     def sortvalue(self, rowindex, colindex):

   279         value =  self._rows[rowindex][colindex]

   279         value =  self._rows[rowindex][colindex]

   280         if value is None:

   280         if value is None:

   281             return u''

   281             return u''

   282         elif isinstance(value, int):

   282         elif isinstance(value, int):

   284         else:

   284         else:

   285             return unicode(value)

   285             return unicode(value)

   286 

   286 

   287 

   287 

   288 class TableWidget(HTMLWidget):

   288 class TableWidget(HTMLWidget):