bpo-43316: gzip: CLI uses non-zero return code on error. (GH-24647)
Exit code is now 1 instead of 0. A message is printed to stderr instead of stdout. This is
the proper behaviour for a tool that can be used in scripts.
diff --git a/Lib/gzip.py b/Lib/gzip.py
index e422773..8002b43 100644
--- a/Lib/gzip.py
+++ b/Lib/gzip.py
@@ -583,8 +583,7 @@ def main():
g = sys.stdout.buffer
else:
if arg[-3:] != ".gz":
- print("filename doesn't end in .gz:", repr(arg))
- continue
+ sys.exit("filename doesn't end in .gz:", repr(arg))
f = open(arg, "rb")
g = builtins.open(arg[:-3], "wb")
else: