diff --git a/vllm/distributed/communication_op.py b/vllm/distributed/communication_op.py
index ede070f5082aa..bfab9c15f4fb2 100644
--- a/vllm/distributed/communication_op.py
+++ b/vllm/distributed/communication_op.py
@@ -1,12 +1,11 @@
 from collections import namedtuple
-from contextlib import contextmanager, nullcontext, suppress 
+from contextlib import contextmanager, nullcontext, suppress
 from dataclasses import dataclass
 from typing import Any, Dict, List, Optional, Tuple, Union
 
 import torch
 from torch.distributed import ProcessGroup
 
-# for shm
 from multiprocessing import shared_memory
 from unittest.mock import patch
 import atexit
@@ -21,10 +20,11 @@
                              get_tp_pynccl_communicator)
 
 from vllm.distributed.device_communicators.shm_broadcast import (
-            ShmRingBufferIO)
+    ShmRingBufferIO)
 
 shm_broadcaster: Optional[ShmRingBufferIO] = None
 
+
 def init_shm_broadcaster(group):
     global shm_broadcaster
     world_size = get_tensor_model_parallel_world_size()
@@ -33,6 +33,7 @@ def init_shm_broadcaster(group):
         shm_broadcaster = ShmRingBufferIO.create_from_process_group(
             group, 1 << 20, 6)
 
+
 @dataclass
 class GraphCaptureContext:
     stream: torch.cuda.Stream
@@ -207,7 +208,7 @@ def broadcast(input_: torch.Tensor,
     torch.distributed.broadcast(input_, src=src, group=group)
     return input_
 
-def broadcast_object(obj: Optional[Any] = None, src: int = 0):#, group: Optional[ProcessGroup] = None):
+def broadcast_object(obj: Optional[Any] = None, src: int = 0):
     """Broadcast the input object.
     NOTE: `src` is the local rank of the source rank.
     """
@@ -225,17 +226,14 @@ def broadcast_object(obj: Optional[Any] = None, src: int = 0):#, group: Optional
         assert src == 0, "Shared memory broadcaster only supports src=0"
         return shm_broadcaster.broadcast_object(obj)
     if torch.distributed.get_rank() == src:
-        torch.distributed.broadcast_object_list([obj],
-                                                src=src,
-                                                group=group)
+        torch.distributed.broadcast_object_list([obj], src=src, group=group)
         return obj
     else:
         recv = [None]
-        torch.distributed.broadcast_object_list(recv,
-                                                src=src,
-                                                group=group)
+        torch.distributed.broadcast_object_list(recv, src=src, group=group)
         return recv[0]
 
+
 def broadcast_object_list(obj_list: List[Any],
                           src: int = 0,
                           group: Optional[ProcessGroup] = None):
@@ -370,6 +368,7 @@ def broadcast_tensor_dict(
             async_handle.wait()
     return tensor_dict
 
+
 def is_in_the_same_node(pg: ProcessGroup):
     """
     This is a collective operation that checks if all processes in the group
@@ -434,8 +433,10 @@ def is_in_the_same_node(pg: ProcessGroup):
 
     return is_in_the_same_node.sum().item() == world_size
 
+
 def destroy_shm_broadcaster():
     global shm_broadcaster
     shm_broadcaster = None
 
+
 atexit.register(destroy_shm_broadcaster)