diff --git a/onnx/export/tar.bz2.py b/onnx/export/tar.bz2.py
index 896b2cbc..d71ebddf 100755
--- a/onnx/export/tar.bz2.py
+++ b/onnx/export/tar.bz2.py
@@ -7,15 +7,12 @@
 
 
 def txz(folder_path, output_path):
-  # 创建.tar文件流
-  tar_stream = bz2.BZ2File(output_path, 'w')
+    stream = bz2.BZ2File(output_path, 'w')
 
-  # 将文件夹压缩为.tar文件流
-  with tarfile.TarFile(fileobj=tar_stream, mode='w') as tar:
-    tar.add(folder_path, arcname='')
+    with tarfile.TarFile(fileobj=stream, mode='w') as tar:
+        tar.add(folder_path, arcname='')
 
-  # 关闭.tar文件流
-  tar_stream.close()
+    stream.close()
 
 
 txz(ONNX_DIR, ONNX_DIR + '.tar.bz2')