Fix UnicodeError in HTML output

* Alter `test_unicode_append` so that actual unicode characters outside the ASCII bytestring range are tested.

 * Make sure output of `render` in markup.py is unicode

 * Add wrapper around output of `export_set` in _html.py so that unicode characters are output.

tablib/formats/_html.py

@@ -11,6 +11,7 @@ if sys.version_info[0] > 2:
     from tablib.packages import markup3 as markup
 else:
     from cStringIO import StringIO
+    import codecs
     from tablib.packages import markup
 
 import tablib
@@ -45,7 +46,9 @@ def export_set(dataset):
 
 	page.table.close()
 
-	stream.writelines(str(page))
+    # Allow unicode characters in output
+	wrapper = codecs.getwriter("utf8")(stream)
+	wrapper.writelines(unicode(page))
 
 	return stream.getvalue()
 

tablib/packages/markup.py

@@ -67,7 +67,7 @@ class element:
     def render( self, tag, single, between, kwargs ):
         """Append the actual tags to content."""
 
-        out = "<%s" % tag
+        out = u"<%s" % tag
         for key, value in kwargs.iteritems( ):
             if value is not None:               # when value is None that means stuff like <... checked>
                 key = key.strip('_')            # strip this so class_ will mean class, etc.
@@ -75,16 +75,16 @@ class element:
                     key = 'http-equiv'
                 elif key == 'accept_charset':
                     key = 'accept-charset'
-                out = "%s %s=\"%s\"" % ( out, key, escape( value ) )
+                out = u"%s %s=\"%s\"" % ( out, key, escape( value ) )
             else:
-                out = "%s %s" % ( out, key )
+                out = u"%s %s" % ( out, key )
         if between is not None:
-            out = "%s>%s</%s>" % ( out, between, tag )
+            out = u"%s>%s</%s>" % ( out, between, tag )
         else:
             if single:
-                out = "%s />" % out
+                out = u"%s />" % out
             else:
-                out = "%s>" % out
+                out = u"%s>" % out
         if self.parent is not None:
             self.parent.content.append( out )
         else:

test_tablib.py

@@ -308,7 +308,7 @@ class TablibTestCase(unittest.TestCase):
     def test_unicode_append(self):
         """Passes in a single unicode charecter and exports."""
 
-        new_row = ('å', 'é')
+        new_row = (u'å', u'é')
         data.append(new_row)
 
         data.json