Update app.py

app.py

@@ -9,6 +9,7 @@ from langchain.document_loaders import PyPDFLoader
 import os
 import fitz
 from PIL import Image
+import socket
 
 # Global variables
 COUNT, N = 0, 0
@@ -121,7 +122,15 @@ if __name__ == "__main__":
             "text"    # Define txt
         ],   
         title="PDF-Powered Chatbot"     
-    ).interface.launch(server_port=7861, server_name="0.0.0.0", port_checking_timeout=1) # Short checking timeout - for speed
+    )
+
+def find_free_port():
+    with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:
+        s.bind(('', 0))
+        return s.getsockname()[1]
+
+free_port = find_free_port()
+interface.launch(server_port=free_port)