random sample from set

Summary: Starting Python 3.11, the random.sample population must be a sequence, and no longer auto-converts sets to lists.  Fix bug in the d2 dataloader by convert set to list first

Differential Revision: D72924685

fbshipit-source-id: bc6328158980da94e597ef7abfe5e8e241ecab4a

Author: dspgbgjd

detectron2/data/common.py

@@ -130,7 +130,7 @@ def __getitem__(self, idx):
             # _map_func fails for this idx, use a random new index from the pool
             retry_count += 1
             self._fallback_candidates.discard(cur_idx)
-            cur_idx = self._rng.sample(self._fallback_candidates, k=1)[0]
+            cur_idx = self._rng.sample(list(self._fallback_candidates), k=1)[0]
 
             if retry_count >= 3:
                 logger = logging.getLogger(__name__)