Merge branch 'main' into add_sigir_dataset

Author: radekosmulski

examples/usecases/retrieval-with-hyperparameter-optimization.ipynb

@@ -464,7 +464,7 @@
     "\n",
     "    hit_rate = 0\n",
     "    for cust_id in range(cls_idxs.shape[0]):\n",
-    "        purchases = set(val_cust2purchases[cust_id+1])\n",
+    "        purchases = set(val_cust2purchases[cust_id+2])\n",
     "        candidates = set(cls_idxs[cust_id])\n",
     "        hit_rate += len(purchases.intersection(candidates))\n",
     "        \n",