python-3.6.zip added from Github

README.cosmo contains the necessary links.

third_party/python/Lib/test/test_utf8source.py

@@ -0,0 +1,43 @@
+# This file is marked as binary in the CVS, to prevent MacCVS from recoding it.
+
+import unittest
+
+class PEP3120Test(unittest.TestCase):
+
+    def test_pep3120(self):
+        self.assertEqual(
+            "Питон".encode("utf-8"),
+            b'\xd0\x9f\xd0\xb8\xd1\x82\xd0\xbe\xd0\xbd'
+        )
+        self.assertEqual(
+            "\П".encode("utf-8"),
+            b'\\\xd0\x9f'
+        )
+
+    def test_badsyntax(self):
+        try:
+            import test.badsyntax_pep3120
+        except SyntaxError as msg:
+            msg = str(msg).lower()
+            self.assertTrue('utf-8' in msg)
+        else:
+            self.fail("expected exception didn't occur")
+
+
+class BuiltinCompileTests(unittest.TestCase):
+
+    # Issue 3574.
+    def test_latin1(self):
+        # Allow compile() to read Latin-1 source.
+        source_code = '# coding: Latin-1\nu = "Ç"\n'.encode("Latin-1")
+        try:
+            code = compile(source_code, '<dummy>', 'exec')
+        except SyntaxError:
+            self.fail("compile() cannot handle Latin-1 source")
+        ns = {}
+        exec(code, ns)
+        self.assertEqual('Ç', ns['u'])
+
+
+if __name__ == "__main__":
+    unittest.main()