python-3.6.zip added from Github

README.cosmo contains the necessary links.

third_party/python/Tools/test2to3/test/runtests.py

@@ -0,0 +1,19 @@
+# Fictitious test runner for the project
+
+import sys, os
+
+if sys.version_info > (3,):
+    # copy test suite over to "build/lib" and convert it
+    from distutils.util import copydir_run_2to3
+    testroot = os.path.dirname(__file__)
+    newroot = os.path.join(testroot, '..', 'build/lib/test')
+    copydir_run_2to3(testroot, newroot)
+    # in the following imports, pick up the converted modules
+    sys.path[0] = newroot
+
+# run the tests here...
+
+from test_foo import FooTest
+
+import unittest
+unittest.main()