diff --git a/sim_drone.py b/sim_drone.py
index 289b90f..c9600fe 100644
--- a/sim_drone.py
+++ b/sim_drone.py
@@ -85,7 +85,7 @@ def modified_environ(*remove, **update):
         [env.pop(k) for k in remove_after]
 
 
-#@app.command()
+# @app.command()
 def start(tracker_instance: int = 0, sys_id: int = 1):
     """Starts the simulated drone with a given sys_id,
     each drone must have it's own unique ID.
@@ -96,14 +96,14 @@ def start(tracker_instance: int = 0, sys_id: int = 1):
     with logger.contextualize(syd_id=sys_id):
         env = os.environ
         with modified_environ(
-            SERIAL0_PORT =str( int(env['SERIAL0_PORT']) + 10 * tracker_instance),
-            MAVROS2_PORT=str( int(env['MAVROS2_PORT']) + 10 * tracker_instance),
-            MAVROS1_PORT=str( int(env['MAVROS1_PORT']) + 10 * tracker_instance),
-            FDM_PORT_IN=str( int(env['FDM_PORT_IN']) +  10 * tracker_instance),
-            SITL_PORT=str( int(env['SITL_PORT']) + 10 * tracker_instance),
+            SERIAL0_PORT=str(int(env["SERIAL0_PORT"]) + 10 * tracker_instance),
+            MAVROS2_PORT=str(int(env["MAVROS2_PORT"]) + 10 * tracker_instance),
+            MAVROS1_PORT=str(int(env["MAVROS1_PORT"]) + 10 * tracker_instance),
+            FDM_PORT_IN=str(int(env["FDM_PORT_IN"]) + 10 * tracker_instance),
+            SITL_PORT=str(int(env["SITL_PORT"]) + 10 * tracker_instance),
             TRACKER_INSTANCE=str(tracker_instance),
             DRONE_SYS_ID=str(sys_id),
-        ):  
+        ):
             logger.info("Starting drone stack, this may take some time")
             docker_stack = sh.docker.compose(
                 "--profile",
@@ -119,15 +119,16 @@ def start(tracker_instance: int = 0, sys_id: int = 1):
 @app.command()
 def start_group():
     env = os.environ
-    sim_drone_count = int(env['SIM_DRONE_COUNT'])
+    sim_drone_count = int(env["SIM_DRONE_COUNT"])
     start_ros_master()
     """Start a group of robots"""
     for i in range(sim_drone_count):
         logger.info(f"start robot {i}")
-        start(tracker_instance=i,sys_id=i + 1)
+        start(tracker_instance=i, sys_id=i + 1)
         # if i == 0:
         #     wait_for_gazebo()
 
+
 def start_ros_master():
     docker_stack = sh.docker.compose(
         "--profile",
@@ -139,6 +140,7 @@ def start_ros_master():
     )
     processes.append(docker_stack)
 
+
 def cleanup():
     # Wait for all subprocesses to exit
     logger.info("Waiting for commands to exit")
@@ -148,7 +150,9 @@ def cleanup():
             for waitable in processes:
                 waitable.kill()
                 waitable.wait()
-    except Exception as e: print(e)
+    except Exception as e:
+        print(e)
+
 
 atexit.register(cleanup)