diff --git a/egs/zipvoice/local/compute_fbank.py b/egs/zipvoice/local/compute_fbank.py
index 09a154229..0c440b995 100644
--- a/egs/zipvoice/local/compute_fbank.py
+++ b/egs/zipvoice/local/compute_fbank.py
@@ -19,11 +19,13 @@
 import argparse
 import logging
 import os
+from concurrent.futures import ProcessPoolExecutor as Pool
 from pathlib import Path
 from typing import Optional
-from concurrent.futures import ProcessPoolExecutor as Pool
 
+import lhotse
 import torch
+from feature import TorchAudioFbank, TorchAudioFbankConfig
 from lhotse import (
     CutSet,
     LilcomChunkyWriter,
@@ -31,9 +33,6 @@ from lhotse import (
     set_audio_duration_mismatch_tolerance,
 )
 
-from feature import TorchAudioFbank, TorchAudioFbankConfig
-import lhotse
-
 # Torch's multithreaded behavior needs to be disabled or
 # it wastes a lot of CPU and slow things down.
 # Do this outside of main() in case it needs to take effect
diff --git a/egs/zipvoice/local/preprocess_emilia.py b/egs/zipvoice/local/preprocess_emilia.py
index bd76446aa..96a7ff228 100644
--- a/egs/zipvoice/local/preprocess_emilia.py
+++ b/egs/zipvoice/local/preprocess_emilia.py
@@ -24,15 +24,14 @@ This file reads the texts in given manifest and save the cleaned new cuts.
 """
 
 import argparse
-import logging
 import glob
+import logging
 import os
+from concurrent.futures import ProcessPoolExecutor as Pool
 from pathlib import Path
 from typing import List
 
 from lhotse import CutSet, load_manifest_lazy
-from concurrent.futures import ProcessPoolExecutor as Pool
-
 from tokenizer import (
     is_alphabet,
     is_chinese,