examples: add start_ui_example.py

examples/start_ui_example.py

@@ -0,0 +1,53 @@
+#!/usr/bin/env python3
+"""
+Example showing how to use cognee.start_ui() to launch the frontend.
+
+This demonstrates the new UI functionality that works similar to DuckDB's start_ui().
+"""
+
+import asyncio
+import cognee
+import time
+
+
+async def main():
+    # First, let's add some data to cognee for the UI to display
+    print("Adding sample data to cognee...")
+    await cognee.add("Natural language processing (NLP) is an interdisciplinary subfield of computer science and information retrieval.")
+    await cognee.add("Machine learning (ML) is a subset of artificial intelligence that focuses on algorithms and statistical models.")
+    
+    # Generate the knowledge graph
+    print("Generating knowledge graph...")
+    await cognee.cognify()
+    
+    print("\n" + "="*60)
+    print("Starting cognee UI...")
+    print("="*60)
+    
+    # Start the UI server
+    server = cognee.start_ui(
+        host="localhost", 
+        port=3000, 
+        open_browser=True  # This will automatically open your browser
+    )
+    
+    if server:
+        print("UI server started successfully!")
+        print("The interface will be available at: http://localhost:3000")
+        print("\nPress Ctrl+C to stop the server when you're done...")
+        
+        try:
+            # Keep the server running
+            while server.poll() is None:  # While process is still running
+                time.sleep(1)
+        except KeyboardInterrupt:
+            print("\nStopping UI server...")
+            server.terminate()
+            server.wait()  # Wait for process to finish
+            print("UI server stopped.")
+    else:
+        print("Failed to start UI server. Check the logs above for details.")
+
+
+if __name__ == "__main__":
+    asyncio.run(main())