diff --git a/robyn/__init__.py b/robyn/__init__.py
index 656f1a91f..23f8c68e6 100644
--- a/robyn/__init__.py
+++ b/robyn/__init__.py
@@ -10,6 +10,7 @@
 from robyn import status_codes
 from robyn.argument_parser import Config
 from robyn.authentication import AuthenticationHandler
+from robyn.cli import start_dev_server
 from robyn.dependency_injection import DependencyMap
 from robyn.env_populator import load_vars
 from robyn.events import Events
@@ -56,8 +57,6 @@ def __init__(
                 "SERVER IS RUNNING IN VERBOSE/DEBUG MODE. Set --log-level to WARN to run in production mode.",
                 color=Colors.BLUE,
             )
-        if self.config.dev:
-            exit("Dev mode is not supported in the python wrapper. Please use the CLI. e.g. python3 -m robyn app.py --dev ")
 
         self.router = Router()
         self.middleware_router = MiddlewareRouter()
@@ -225,21 +224,24 @@ def start(self, host: str = "127.0.0.1", port: int = 8080, _check_port: bool = T
 
         mp.allow_connection_pickling()
 
-        run_processes(
-            host,
-            port,
-            self.directories,
-            self.request_headers,
-            self.router.get_routes(),
-            self.middleware_router.get_global_middlewares(),
-            self.middleware_router.get_route_middlewares(),
-            self.web_socket_router.get_routes(),
-            self.event_handlers,
-            self.config.workers,
-            self.config.processes,
-            self.response_headers,
-            open_browser,
-        )
+        if self.config.dev:
+            start_dev_server(self.config, self.config.file_path)
+        else:
+            run_processes(
+                host,
+                port,
+                self.directories,
+                self.request_headers,
+                self.router.get_routes(),
+                self.middleware_router.get_global_middlewares(),
+                self.middleware_router.get_route_middlewares(),
+                self.web_socket_router.get_routes(),
+                self.event_handlers,
+                self.config.workers,
+                self.config.processes,
+                self.response_headers,
+                open_browser,
+            )
 
     def exception(self, exception_handler: Callable):
         self.exception_handler = exception_handler
diff --git a/robyn/argument_parser.py b/robyn/argument_parser.py
index a1b532f9a..43dd07fbb 100644
--- a/robyn/argument_parser.py
+++ b/robyn/argument_parser.py
@@ -26,6 +26,12 @@ def __init__(self) -> None:
             default=False,
             help="Development mode. It restarts the server based on file changes.",
         )
+        parser.add_argument(
+            "--file",
+            dest="file_path",
+            default=None,
+            help="The file associated.",
+        )
         parser.add_argument(
             "--log-level",
             dest="log_level",
@@ -75,6 +81,7 @@ def __init__(self) -> None:
         self.processes = args.processes
         self.workers = args.workers
         self.dev = args.dev
+        self.file_path = args.file_path
         self.create = args.create
         self.docs = args.docs
         self.open_browser = args.open_browser
@@ -82,11 +89,12 @@ def __init__(self) -> None:
         self.compile_rust_path = args.compile_rust_path
         self.create_rust_file = args.create_rust_file
 
-        # find something that ends with .py in unknown_args
-        for arg in unknown_args:
-            if arg.endswith(".py"):
-                self.file_path = arg
-                break
+        if self.file_path is None:
+            # find something that ends with .py in unknown_args
+            for arg in unknown_args:
+                if arg.endswith(".py"):
+                    self.file_path = arg
+                    break
 
         if self.dev and (self.processes != 1 or self.workers != 1):
             raise Exception("--processes and --workers shouldn't be used with --dev")