python-3.6.zip added from Github

README.cosmo contains the necessary links.

third_party/python/Lib/test/test_future5.py

@@ -0,0 +1,21 @@
+# Check that multiple features can be enabled.
+from __future__ import unicode_literals, print_function
+
+import sys
+import unittest
+from test import support
+
+
+class TestMultipleFeatures(unittest.TestCase):
+
+    def test_unicode_literals(self):
+        self.assertIsInstance("", str)
+
+    def test_print_function(self):
+        with support.captured_output("stderr") as s:
+            print("foo", file=sys.stderr)
+        self.assertEqual(s.getvalue(), "foo\n")
+
+
+if __name__ == '__main__':
+    unittest.main()