Update app.py

app.py

@@ -9,6 +9,15 @@ from langchain.embeddings import SentenceTransformerEmbeddings
 from langchain.embeddings.huggingface import HuggingFaceEmbeddings
 embeddings = HuggingFaceEmbeddings(model_name="all-MiniLM-L6-v2")
 
+import subprocess
+import sys
+
+# Install sentence-transformers if not installed
+try:
+    import sentence_transformers
+except ImportError:
+    subprocess.check_call([sys.executable, "-m", "pip", "install", "sentence-transformers"])
+
 
 # Initialize embedding model
 embeddings = SentenceTransformerEmbeddings(model_name="all-MiniLM-L6-v2")