Fix encoding bugs in Python2 (non-ASCII characters) (#80)

Author: MiguelSR

tableaudocumentapi/datasource.py

@@ -31,7 +31,7 @@
 def _get_metadata_xml_for_field(root_xml, field_name):
     if "'" in field_name:
         field_name = sax.escape(field_name, {"'": "'"})
-    xpath = ".//metadata-record[@class='column'][local-name='{}']".format(field_name)
+    xpath = u".//metadata-record[@class='column'][local-name='{}']".format(field_name)
     return root_xml.find(xpath)
 
 

tableaudocumentapi/field.py

@@ -199,4 +199,9 @@ def _read_description(xmldata):
         if description is None:
             return None
 
-        return u'{}'.format(ET.tostring(description, encoding='utf-8'))  # This is necessary for py3 support
+        description_string = ET.tostring(description, encoding='utf-8')
+        # Format expects a unicode string so in Python 2 we have to do the explicit conversion
+        if isinstance(description_string, bytes):
+            description_string = description_string.decode('utf-8')
+
+        return description_string