Merge pull request #293 from bgilbert/enum

examples/deepzoom: enforce `--format` enum in argparse

Author: bgilbert

examples/deepzoom/deepzoom_multiserver.py

@@ -356,8 +356,8 @@ def __init__(self, relpath: str):
     parser.add_argument(
         '-f',
         '--format',
-        metavar='{jpeg|png}',
         dest='DEEPZOOM_FORMAT',
+        choices=['jpeg', 'png'],
         help='image format for tiles [jpeg]',
     )
     parser.add_argument(

examples/deepzoom/deepzoom_server.py

@@ -293,8 +293,8 @@ def xfrm(img: Image.Image) -> None:
     parser.add_argument(
         '-f',
         '--format',
-        metavar='{jpeg|png}',
         dest='DEEPZOOM_FORMAT',
+        choices=['jpeg', 'png'],
         help='image format for tiles [jpeg]',
     )
     parser.add_argument(

examples/deepzoom/deepzoom_tile.py

@@ -426,9 +426,9 @@ def _shutdown(self) -> None:
     parser.add_argument(
         '-f',
         '--format',
-        metavar='{jpeg|png}',
         dest='format',
         default='jpeg',
+        choices=['jpeg', 'png'],
         help='image format for tiles [jpeg]',
     )
     parser.add_argument(