python-3.6.zip added from Github

README.cosmo contains the necessary links.

third_party/python/Lib/test/test_osx_env.py

@@ -0,0 +1,34 @@
+"""
+Test suite for OS X interpreter environment variables.
+"""
+
+from test.support import EnvironmentVarGuard
+import subprocess
+import sys
+import sysconfig
+import unittest
+
+@unittest.skipUnless(sys.platform == 'darwin' and
+                     sysconfig.get_config_var('WITH_NEXT_FRAMEWORK'),
+                     'unnecessary on this platform')
+class OSXEnvironmentVariableTestCase(unittest.TestCase):
+    def _check_sys(self, ev, cond, sv, val = sys.executable + 'dummy'):
+        with EnvironmentVarGuard() as evg:
+            subpc = [str(sys.executable), '-c',
+                'import sys; sys.exit(2 if "%s" %s %s else 3)' % (val, cond, sv)]
+            # ensure environment variable does not exist
+            evg.unset(ev)
+            # test that test on sys.xxx normally fails
+            rc = subprocess.call(subpc)
+            self.assertEqual(rc, 3, "expected %s not %s %s" % (ev, cond, sv))
+            # set environ variable
+            evg.set(ev, val)
+            # test that sys.xxx has been influenced by the environ value
+            rc = subprocess.call(subpc)
+            self.assertEqual(rc, 2, "expected %s %s %s" % (ev, cond, sv))
+
+    def test_pythonexecutable_sets_sys_executable(self):
+        self._check_sys('PYTHONEXECUTABLE', '==', 'sys.executable')
+
+if __name__ == "__main__":
+    unittest.main()