diff --git a/paddlespeech/cli/asr/infer.py b/paddlespeech/cli/asr/infer.py
index 84de0109e..33ee94137 100644
--- a/paddlespeech/cli/asr/infer.py
+++ b/paddlespeech/cli/asr/infer.py
@@ -12,10 +12,10 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 import argparse
+import io
 import os
 import sys
 import time
-import io 
 from collections import OrderedDict
 from typing import List
 from typing import Optional