example: annotated related arg for extract_faces()

Author: georgeh0

examples/face_recognition/main.py

@@ -28,7 +28,12 @@ class FaceBase:
 MAX_IMAGE_WIDTH = 1280
 
 
-@cocoindex.op.function(cache=True, behavior_version=1, gpu=True)
+@cocoindex.op.function(
+    cache=True,
+    behavior_version=1,
+    gpu=True,
+    related_arg_attr=(cocoindex.op.RelatedFieldAttribute.RECTS_BASE_IMAGE, "content"),
+)
 def extract_faces(content: bytes) -> list[FaceBase]:
     """Extract the first pages of a PDF."""
     orig_img = Image.open(io.BytesIO(content)).convert("RGB")