diff -up libkdtree++_0.7.0/python-bindings/py-kdtree_test.py.py3 libkdtree++_0.7.0/python-bindings/py-kdtree_test.py
--- libkdtree++_0.7.0/python-bindings/py-kdtree_test.py.py3	2008-12-30 06:06:36.000000000 -0700
+++ libkdtree++_0.7.0/python-bindings/py-kdtree_test.py	2019-03-19 14:55:53.973285963 -0600
@@ -3,9 +3,12 @@
 #
 
 import unittest
+import sys
 
 from kdtree import KDTree_2Int, KDTree_4Int, KDTree_1Float, KDTree_3Float, KDTree_6Float
 
+if sys.version > '3':
+    long = int
 
 class KDTree_2IntTestCase(unittest.TestCase):
     def test_empty(self):