Partially fixed virtual assistant demo on mac (#121)

* Update requirements.txt

* Update requirements.txt

* Update requirements.txt

* Update main.py

* Update requirements.txt

* Update main.py

* Updated dependecies

demos/virtual_ai_assistant_demo/main.py

@@ -5,7 +5,6 @@
 from pathlib import Path
 from typing import List, Optional, Set
 
-import faiss
 import fitz
 import gradio as gr
 import numpy as np
@@ -26,6 +25,9 @@
 from optimum.intel import OVModelForCausalLM, OVModelForFeatureExtraction, OVWeightQuantizationConfig, OVConfig, OVQuantizer, OVModelForSequenceClassification
 from transformers import AutoTokenizer
 
+# it must be imported as the last one; otherwise, it causes a crash on macOS
+import faiss
+
 # Global variables initialization
 MODEL_DIR = Path("model")
 inference_lock = threading.Lock()
@@ -311,7 +313,7 @@ def run(chat_model_name: str, embedding_model_name: str, reranker_model_name: st
     parser = argparse.ArgumentParser()
     parser.add_argument("--chat_model", type=str, default="meta-llama/Llama-3.2-3B-Instruct", help="Path/name of the chat model")
     parser.add_argument("--embedding_model", type=str, default="BAAI/bge-small-en-v1.5", help="Path/name of the model for embeddings")
-    parser.add_argument("--reranker_model", type=str, default="BAAI/bge-base-en-v1.5", help="Path/name of the reranker model")
+    parser.add_argument("--reranker_model", type=str, default="BAAI/bge-reranker-base", help="Path/name of the reranker model")
     parser.add_argument("--personality", type=str, default="healthcare_personality.yaml", help="Path to the YAML file with chatbot personality")
     parser.add_argument("--hf_token", type=str, help="HuggingFace access token to get Llama3")
     parser.add_argument("--public", default=False, action="store_true", help="Whether interface should be available publicly")