Update deprecated Python methods.

This change replaces assertRegexpMatches() with assertRegex() and assertEquals() with assertEqual().

https://docs.python.org/3/library/unittest.html#unittest.TestCase.assertRegex

PiperOrigin-RevId: 646527672
Change-Id: I0b49877daa7d4865e5bfebcae137583f1c44af9f
diff --git a/examples/py_native/test.py b/examples/py_native/test.py
index f9543aa..113b11e 100644
--- a/examples/py_native/test.py
+++ b/examples/py_native/test.py
@@ -8,10 +8,10 @@
 class TestGetNumber(unittest.TestCase):
 
   def test_ok(self):
-    self.assertEquals(GetNumber(), 42)
+    self.assertEqual(GetNumber(), 42)
 
   def test_fib(self):
-    self.assertEquals(Fib(5), 8)
+    self.assertEqual(Fib(5), 8)
 
 if __name__ == '__main__':
   unittest.main()