Issue #20283: RE pattern methods now accept the string keyword parameters
as documented.  The pattern and source keyword parameters are left as
deprecated aliases.
diff --git a/Lib/test/test_re.py b/Lib/test/test_re.py
index fe71c84..d769288 100644
--- a/Lib/test/test_re.py
+++ b/Lib/test/test_re.py
@@ -933,6 +933,19 @@
         self.assertEqual(out.getvalue().splitlines(),
                          ['literal 102', 'literal 111', 'literal 111'])
 
+    def test_keyword_parameters(self):
+        # Issue #20283: Accepting the string keyword parameter.
+        pat = re.compile(r'(ab)')
+        self.assertEqual(
+            pat.match(string='abracadabra', pos=7, endpos=10).span(), (7, 9))
+        self.assertEqual(
+            pat.search(string='abracadabra', pos=3, endpos=10).span(), (7, 9))
+        self.assertEqual(
+            pat.findall(string='abracadabra', pos=3, endpos=10), ['ab'])
+        self.assertEqual(
+            pat.split(string='abracadabra', maxsplit=1),
+            ['', 'ab', 'racadabra'])
+
 
 def run_re_tests():
     from test.re_tests import tests, SUCCEED, FAIL, SYNTAX_ERROR