bpo-42128: Structural Pattern Matching (PEP 634) (GH-22917)

Co-authored-by: Guido van Rossum <guido@python.org>
Co-authored-by: Talin <viridia@gmail.com>
Co-authored-by: Pablo Galindo <pablogsal@gmail.com>
diff --git a/Lib/keyword.py b/Lib/keyword.py
index 3186171..cc2b46b 100644
--- a/Lib/keyword.py
+++ b/Lib/keyword.py
@@ -54,7 +54,9 @@
 ]
 
 softkwlist = [
-
+    '_',
+    'case',
+    'match'
 ]
 
 iskeyword = frozenset(kwlist).__contains__