Update app.py

app.py

@@ -408,6 +408,9 @@ class CSCBM25Index(CSCInvertedIndex):
                 indices.append(docid) 
             indptr.append(len(data)) 
 
+        data = np.array(data, dtype=np.float32)
+        indices = np.array(indices, dtype=np.int32)
+        indptr = np.array(indptr, dtype=np.int32)
         posting_lists_matrix = csc_matrix(
             (data, indices, indptr),
             shape=(total_docs, len(posting_lists))
@@ -490,6 +493,7 @@ class BaseCSCInvertedIndexRetriever(BaseRetriever):
                 continue
             tid = self.index.vocab[tok]
             weight = self.index.posting_lists_matrix[target_docid, tid]
+            if weight == 0: continue 
             term_weights[tok] = weight 
         return term_weights
         ## YOUR_CODE_ENDS_HERE