Merge pull request #401 from openml/dataupload

data upload

Author: mfeurer

openml/datasets/dataset.py

@@ -121,7 +121,7 @@ def __init__(self, dataset_id=None, name=None, version=None, description=None,
                     with open(self.data_pickle_file, "wb") as fh:
                         pickle.dump((X, categorical, attribute_names), fh, -1)
                     logger.debug("Saved dataset %d: %s to file %s" %
-                                 (self.dataset_id, self.name, self.data_pickle_file))
+                                 (int(self.dataset_id or -1), self.name, self.data_pickle_file))
 
     def push_tag(self, tag):
         """Annotates this data set with a tag on the server.
@@ -446,7 +446,11 @@ def _to_xml(self):
         for prop in props:
             content = getattr(self, prop, None)
             if content is not None:
-                xml_dataset += "<oml:{0}>{1}</oml:{0}>\n".format(prop, content)
+                if isinstance(content, (list,set)):
+                    for item in content:
+                        xml_dataset += "<oml:{0}>{1}</oml:{0}>\n".format(prop, item)
+                else:
+                    xml_dataset += "<oml:{0}>{1}</oml:{0}>\n".format(prop, content)
         xml_dataset += "</oml:data_set_description>"
         return xml_dataset