synctiles: avoid lambda in Pool initializer

bgilbert · bgilbert · commit 46795054af62 · 2025-12-04T02:23:34.000-08:00
This raises a PicklingError on Python 3.14.

Signed-off-by: Benjamin Gilbert &lt;bgilbert@cs.cmu.edu&gt;
diff --git a/demo/_synctiles.py b/demo/_synctiles.py
@@ -508,9 +508,7 @@ def sync_slide(
                 mpp = None
 
             # Start compute pool
-            pool = Pool(
-                workers, lambda: pool_init(storage.bucket.name, slide_path)
-            )
+            pool = Pool(workers, pool_init, (storage.bucket.name, slide_path))
             try:
                 # Tile slide
                 def do_tile(
