Refactor code formatting and add version display

option

src/backend/langflow/__main__.py

@@ -12,7 +12,8 @@ from dotenv import load_dotenv
 from langflow.main import setup_app
 from langflow.services.database.utils import session_getter
 from langflow.services.deps import get_db_service, get_settings_service
-from langflow.services.utils import initialize_services, initialize_settings_service
+from langflow.services.utils import (initialize_services,
+                                     initialize_settings_service)
 from langflow.utils.logger import configure, logger
 from multiprocess import Process, cpu_count  # type: ignore
 from rich import box
@@ -96,6 +97,27 @@ def update_settings(
         settings_service.settings.update_settings(STORE=False)
 
 
+
+def version_callback(value: bool):
+    """
+    Show the version and exit.
+    """
+    from langflow import __version__
+    if value:
+        typer.echo(f"Langflow Version: {__version__}")
+        raise typer.Exit()
+
+@app.callback()
+def main_entry_point(
+    version: bool = typer.Option(None, "--version", callback=version_callback, is_eager=True, help="Show the version and exit.")
+):
+    """
+    Main entry point for the Langflow CLI.
+    """
+    pass
+
+
+
 @app.command()
 def run(
     host: str = typer.Option("127.0.0.1", help="Host to bind the server to.", envvar="LANGFLOW_HOST"),