diff --git a/ete3/ncbi_taxonomy/ncbiquery.py b/ete3/ncbi_taxonomy/ncbiquery.py
index 07083156d..b9390e3f1 100644
--- a/ete3/ncbi_taxonomy/ncbiquery.py
+++ b/ete3/ncbi_taxonomy/ncbiquery.py
@@ -371,7 +371,7 @@ def get_descendant_taxa(self, parent, intermediate_nodes=False, rank_limit=None,
             elif intermediate_nodes:
                 return list(map(int, [n.name for n in tree.get_descendants()]))
             else:
-                return map(int, [n.name for n in tree])
+                return list(map(int, [n.name for n in tree]))
 
         elif intermediate_nodes:
             return [tid for tid, count in six.iteritems(descendants)]
@@ -410,11 +410,11 @@ def get_topology(self, taxids, intermediate_nodes=False, rank_limit=None, collap
             visited = set()
             start = prepostorder.index(root_taxid)
             try:
-            	end = prepostorder.index(root_taxid, start+1)
-            	subtree = prepostorder[start:end+1]
+                end = prepostorder.index(root_taxid, start+1)
+                subtree = prepostorder[start:end+1]
             except ValueError:
                 # If root taxid is not found in postorder, must be a tip node
-            	subtree = [root_taxid]
+                subtree = [root_taxid]
             leaves = set([v for v, count in Counter(subtree).items() if count == 1])
             nodes[root_taxid] = PhyloTree(name=str(root_taxid))
             current_parent = nodes[root_taxid]