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-rw-r--r--Lib/optparse.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/Lib/optparse.py b/Lib/optparse.py
index d0d5961..87d7737 100644
--- a/Lib/optparse.py
+++ b/Lib/optparse.py
@@ -813,7 +813,7 @@ class Option:
parser.print_version()
parser.exit()
else:
- raise RuntimeError, "unknown action %r" % self.action
+ raise ValueError("unknown action %r" % self.action)
return 1