Update app.py

app.py

@@ -12,6 +12,7 @@ import pandas as pd
 from chromadb.config import Settings
 from chromadb.utils import embedding_functions
 from FlagEmbedding import BGEM3FlagModel
+from sklearn.metrics.pairwise import cosine_similarity
 
 model = BGEM3FlagModel('BAAI/bge-m3',  
                        use_fp16=True) # Setting use_fp16 to True speeds up computation with a slight performance degradation