diff --git a/dataset/aidatatang_200zh/aidatatang_200zh.py b/dataset/aidatatang_200zh/aidatatang_200zh.py
index b8758c9a76863633ed6701aed402c911fec68cec..85f478c20ddba18d40c175c724370b81c93e46d0 100644
--- a/dataset/aidatatang_200zh/aidatatang_200zh.py
+++ b/dataset/aidatatang_200zh/aidatatang_200zh.py
@@ -25,6 +25,7 @@ import os
 from pathlib import Path
 
 import soundfile
+
 from utils.utility import download
 from utils.utility import unpack
 
diff --git a/dataset/aishell/aishell.py b/dataset/aishell/aishell.py
index 32dc119d2ffb8110f49dbdddbba924ad9caa471c..7431fc08369546f372c93dc923f50300f1da10a3 100644
--- a/dataset/aishell/aishell.py
+++ b/dataset/aishell/aishell.py
@@ -25,6 +25,7 @@ import os
 from pathlib import Path
 
 import soundfile
+
 from utils.utility import download
 from utils.utility import unpack
 
diff --git a/dataset/librispeech/librispeech.py b/dataset/librispeech/librispeech.py
index 0c779696d67332e7eaa04fd26dca80ccd2f8754c..69f0db599e12d0a482a8d7783eb85ce9e04c744d 100644
--- a/dataset/librispeech/librispeech.py
+++ b/dataset/librispeech/librispeech.py
@@ -27,6 +27,7 @@ import os
 from multiprocessing.pool import Pool
 
 import soundfile
+
 from utils.utility import download
 from utils.utility import unpack
 
diff --git a/dataset/mini_librispeech/mini_librispeech.py b/dataset/mini_librispeech/mini_librispeech.py
index d96b5d64d5d242f028c1736be5ac0c7bac3c24e0..730c73a8b4dc44691351717de1bfe918f3b957ac 100644
--- a/dataset/mini_librispeech/mini_librispeech.py
+++ b/dataset/mini_librispeech/mini_librispeech.py
@@ -26,6 +26,7 @@ import os
 from multiprocessing.pool import Pool
 
 import soundfile
+
 from utils.utility import download
 from utils.utility import unpack
 
diff --git a/dataset/musan/musan.py b/dataset/musan/musan.py
index dc237c30ae80aa71b92882262df702e0f8b9d4dc..2ac701bed0c9c24be1d1dffbd0482b6f4ce3f473 100644
--- a/dataset/musan/musan.py
+++ b/dataset/musan/musan.py
@@ -28,6 +28,7 @@ import json
 import os
 
 import soundfile
+
 from utils.utility import download
 from utils.utility import unpack
 
diff --git a/dataset/rir_noise/rir_noise.py b/dataset/rir_noise/rir_noise.py
index 0e055f17b527b374adaeacce72939fcc19003b84..e7b1228904334982f3ed284f64c89a35b1a234c3 100644
--- a/dataset/rir_noise/rir_noise.py
+++ b/dataset/rir_noise/rir_noise.py
@@ -28,6 +28,7 @@ import json
 import os
 
 import soundfile
+
 from utils.utility import download
 from utils.utility import unzip
 
diff --git a/dataset/thchs30/thchs30.py b/dataset/thchs30/thchs30.py
index 879ed58db158b2f68f3224040c43183e6b451078..cdfc0a75c0aacfdf89492d2f83642cb7f5decea8 100644
--- a/dataset/thchs30/thchs30.py
+++ b/dataset/thchs30/thchs30.py
@@ -26,6 +26,7 @@ from multiprocessing.pool import Pool
 from pathlib import Path
 
 import soundfile
+
 from utils.utility import download
 from utils.utility import unpack
 
diff --git a/dataset/timit/timit.py b/dataset/timit/timit.py
index d03c48a1e10e9e40be082928fe27305d0ddbb8c7..c4a9f06631809bd4ca1d72755576d631f8590055 100644
--- a/dataset/timit/timit.py
+++ b/dataset/timit/timit.py
@@ -27,6 +27,7 @@ import string
 from pathlib import Path
 
 import soundfile
+
 from utils.utility import unzip
 
 URL_ROOT = ""
diff --git a/dataset/voxforge/voxforge.py b/dataset/voxforge/voxforge.py
index c388f44917cb1510cc6a26af1e71984fbf37728c..373791bffe04114a51d89f6bf84c6dde504be84c 100644
--- a/dataset/voxforge/voxforge.py
+++ b/dataset/voxforge/voxforge.py
@@ -27,6 +27,7 @@ import shutil
 import subprocess
 
 import soundfile
+
 from utils.utility import download_multi
 from utils.utility import getfile_insensitive
 from utils.utility import unpack
diff --git a/docs/source/released_model.md b/docs/source/released_model.md
index 1b61ccc7bb48b105a63887a971ad954f83120a60..91ef6d166741dc946a916b1c0ffacf820430442f 100644
--- a/docs/source/released_model.md
+++ b/docs/source/released_model.md
@@ -75,4 +75,3 @@ PANN | ESC-50 |[pann-esc50]("./examples/esc50/cls0")|[panns_cnn6.tar.gz](https:/
 | [Ds2 Offline Aishell model](https://deepspeech.bj.bcebos.com/mandarin_models/aishell_model_v1.8_to_v2.x.tar.gz) |        Aishell Dataset         | Char-based  | 234 MB | 2 Conv + 3 bidirectional GRU layers                | 0.0804 | -      | 151 h           |
 | [Ds2 Offline Librispeech model](https://deepspeech.bj.bcebos.com/eng_models/librispeech_v1.8_to_v2.x.tar.gz) |      Librispeech Dataset       | Word-based  | 307 MB | 2 Conv + 3 bidirectional sharing weight RNN layers | -      | 0.0685 | 960 h           |
 | [Ds2 Offline Baidu en8k model](https://deepspeech.bj.bcebos.com/eng_models/baidu_en8k_v1.8_to_v2.x.tar.gz) | Baidu Internal English Dataset | Word-based  | 273 MB | 2 Conv + 3 bidirectional GRU layers                | -      | 0.0541 | 8628 h          |
-
diff --git a/paddlespeech/cli/__init__.py b/paddlespeech/cli/__init__.py
index c82168aee0a1c03de893990e5ed81b8c0f90c360..80ca7a6658d79b92370e522bd46ea4afef26a5b0 100644
--- a/paddlespeech/cli/__init__.py
+++ b/paddlespeech/cli/__init__.py
@@ -11,8 +11,8 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-
 import _locale
+
 from .asr import ASRExecutor
 from .base_commands import BaseCommand
 from .base_commands import HelpCommand
diff --git a/paddlespeech/cls/exps/panns/deploy/predict.py b/paddlespeech/cls/exps/panns/deploy/predict.py
index ee566ed4f8e29171a41364b8e86bb143fb570796..d4e5c22fb12b6453ba6ef6e4192f6a9442b960a9 100644
--- a/paddlespeech/cls/exps/panns/deploy/predict.py
+++ b/paddlespeech/cls/exps/panns/deploy/predict.py
@@ -16,10 +16,11 @@ import os
 
 import numpy as np
 from paddle import inference
+from scipy.special import softmax
+
 from paddleaudio.backends import load as load_audio
 from paddleaudio.datasets import ESC50
 from paddleaudio.features import melspectrogram
-from scipy.special import softmax
 
 # yapf: disable
 parser = argparse.ArgumentParser()
diff --git a/paddlespeech/cls/exps/panns/export_model.py b/paddlespeech/cls/exps/panns/export_model.py
index 63b22981adb62d213f0b2bd79ae9d4b180d06591..c295c6a33838b086480ddc4e681341cbd023d560 100644
--- a/paddlespeech/cls/exps/panns/export_model.py
+++ b/paddlespeech/cls/exps/panns/export_model.py
@@ -15,8 +15,8 @@ import argparse
 import os
 
 import paddle
-from paddleaudio.datasets import ESC50
 
+from paddleaudio.datasets import ESC50
 from paddlespeech.cls.models import cnn14
 from paddlespeech.cls.models import SoundClassifier
 
diff --git a/paddlespeech/cls/exps/panns/predict.py b/paddlespeech/cls/exps/panns/predict.py
index 0a1b6cccfe9b71d7ee98d3b974089e32a7b0145c..9cfd8b6ce44ab7318a218a52bd1c2eaee28d680a 100644
--- a/paddlespeech/cls/exps/panns/predict.py
+++ b/paddlespeech/cls/exps/panns/predict.py
@@ -16,11 +16,11 @@ import argparse
 import numpy as np
 import paddle
 import paddle.nn.functional as F
+
 from paddleaudio.backends import load as load_audio
 from paddleaudio.datasets import ESC50
 from paddleaudio.features import LogMelSpectrogram
 from paddleaudio.features import melspectrogram
-
 from paddlespeech.cls.models import cnn14
 from paddlespeech.cls.models import SoundClassifier
 
diff --git a/paddlespeech/cls/exps/panns/train.py b/paddlespeech/cls/exps/panns/train.py
index 9508a977eae7c13be0a1a8ee2345fda4cbc1a998..1213097899cee2594b5ecf4e91310c16b5f46841 100644
--- a/paddlespeech/cls/exps/panns/train.py
+++ b/paddlespeech/cls/exps/panns/train.py
@@ -15,11 +15,11 @@ import argparse
 import os
 
 import paddle
+
 from paddleaudio.datasets import ESC50
 from paddleaudio.features import LogMelSpectrogram
 from paddleaudio.utils import logger
 from paddleaudio.utils import Timer
-
 from paddlespeech.cls.models import cnn14
 from paddlespeech.cls.models import SoundClassifier
 
diff --git a/paddlespeech/cls/models/panns/panns.py b/paddlespeech/cls/models/panns/panns.py
index b442b2fd1224df90d0ec519124d2fc65397928c5..6d2dac56ac23d9b3322e49703f98e15faf936fd0 100644
--- a/paddlespeech/cls/models/panns/panns.py
+++ b/paddlespeech/cls/models/panns/panns.py
@@ -15,6 +15,7 @@ import os
 
 import paddle.nn as nn
 import paddle.nn.functional as F
+
 from paddleaudio.utils.download import load_state_dict_from_url
 from paddleaudio.utils.env import MODEL_HOME
 
diff --git a/paddlespeech/s2t/frontend/audio.py b/paddlespeech/s2t/frontend/audio.py
index d494cc4fdc66704176b1bdb14e2b8bf08f6d120c..d0368cc8d229e2e298a6fabffa8af09af2f7cbb1 100644
--- a/paddlespeech/s2t/frontend/audio.py
+++ b/paddlespeech/s2t/frontend/audio.py
@@ -356,7 +356,7 @@ class AudioSegment():
         # sox, slow
         try:
             import soxbindings as sox
-        except:
+        except ImportError:
             try:
                 from paddlespeech.s2t.utils import dynamic_pip_install
                 package = "sox"
@@ -364,8 +364,9 @@ class AudioSegment():
                 package = "soxbindings"
                 dynamic_pip_install.install(package)
                 import soxbindings as sox
-            except:
-                raise RuntimeError("Can not install soxbindings on your system." )
+            except Exception:
+                raise RuntimeError(
+                    "Can not install soxbindings on your system.")
 
         tfm = sox.Transformer()
         tfm.set_globals(multithread=False)
diff --git a/paddlespeech/s2t/frontend/utility.py b/paddlespeech/s2t/frontend/utility.py
index e6c7603fa20a8fcfa91ced38a61f1b329191ddf5..d35785db6825761e8bc26aada4c2c4d9d8066b0c 100644
--- a/paddlespeech/s2t/frontend/utility.py
+++ b/paddlespeech/s2t/frontend/utility.py
@@ -102,9 +102,11 @@ def read_manifest(
     with jsonlines.open(manifest_path, 'r') as reader:
         for json_data in reader:
             feat_len = json_data["input"][0]["shape"][
-                0] if "input" in json_data and "shape" in json_data["input"][0] else 1.0
+                0] if "input" in json_data and "shape" in json_data["input"][
+                    0] else 1.0
             token_len = json_data["output"][0]["shape"][
-                0] if "output" in json_data and "shape" in json_data["output"][0] else 1.0
+                0] if "output" in json_data and "shape" in json_data["output"][
+                    0] else 1.0
             conditions = [
                 feat_len >= min_input_len,
                 feat_len <= max_input_len,
diff --git a/paddlespeech/s2t/io/sampler.py b/paddlespeech/s2t/io/sampler.py
index 35b57524b5906d53366ebc1c8d4b36322129bba2..ac55af1236f11d175e9e7717220980cf95c7d79b 100644
--- a/paddlespeech/s2t/io/sampler.py
+++ b/paddlespeech/s2t/io/sampler.py
@@ -20,13 +20,13 @@ from paddle.io import DistributedBatchSampler
 
 from paddlespeech.s2t.utils.log import Log
 
+logger = Log(__name__).getlog()
+
 __all__ = [
     "SortagradDistributedBatchSampler",
     "SortagradBatchSampler",
 ]
 
-logger = Log(__name__).getlog()
-
 
 def _batch_shuffle(indices, batch_size, epoch, clipped=False):
     """Put similarly-sized instances into minibatches for better efficiency
diff --git a/paddlespeech/s2t/models/ds2/__init__.py b/paddlespeech/s2t/models/ds2/__init__.py
index efa50863be3ed2c256457a5f3713fb7a5786bb1b..8d5959c8b62ab6cf41b4fb9fc3eafe652b3cbdf3 100644
--- a/paddlespeech/s2t/models/ds2/__init__.py
+++ b/paddlespeech/s2t/models/ds2/__init__.py
@@ -17,11 +17,11 @@ from paddlespeech.s2t.utils import dynamic_pip_install
 
 try:
     import swig_decoders
-except:
+except ImportError:
     try:
         package_name = 'paddlespeech_ctcdecoders'
         dynamic_pip_install.install(package_name)
-    except:
+    except Exception:
         raise RuntimeError(
             "Can not install package paddlespeech_ctcdecoders on your system. \
                 The DeepSpeech2 model is not supported for your system")
diff --git a/paddlespeech/s2t/models/ds2/deepspeech2.py b/paddlespeech/s2t/models/ds2/deepspeech2.py
index f0a553ec80ffaa14342d9c2e85c4b2171f97c1fe..0dfaec29cd7762904a63676a694f7478fcbbb093 100644
--- a/paddlespeech/s2t/models/ds2/deepspeech2.py
+++ b/paddlespeech/s2t/models/ds2/deepspeech2.py
@@ -129,7 +129,7 @@ class DeepSpeech2Model(nn.Layer):
                 rnn_layer_size=1024,  #RNN layer size (number of RNN cells).
                 use_gru=True,  #Use gru if set True. Use simple rnn if set False.
                 share_rnn_weights=True,  #Whether to share input-hidden weights between forward and backward directional RNNs.Notice that for GRU, weight sharing is not supported.
-                ctc_grad_norm_type=None,))
+                ctc_grad_norm_type=None, ))
         if config is not None:
             config.merge_from_other_cfg(default)
         return default
diff --git a/paddlespeech/s2t/models/ds2_online/__init__.py b/paddlespeech/s2t/models/ds2_online/__init__.py
index 65ddd51224264da968658bfaef7e704b2883b32c..2d304237b607ad6dca43ae0aff6676159faa0832 100644
--- a/paddlespeech/s2t/models/ds2_online/__init__.py
+++ b/paddlespeech/s2t/models/ds2_online/__init__.py
@@ -17,11 +17,11 @@ from paddlespeech.s2t.utils import dynamic_pip_install
 
 try:
     import swig_decoders
-except:
+except ImportError:
     try:
         package_name = 'paddlespeech_ctcdecoders'
         dynamic_pip_install.install(package_name)
-    except:
+    except Exception:
         raise RuntimeError(
             "Can not install package paddlespeech_ctcdecoders on your system. \
                 The DeepSpeech2 model is not supported for your system")
diff --git a/paddlespeech/s2t/modules/ctc.py b/paddlespeech/s2t/modules/ctc.py
index 774bcc62ed1f8f651d7f60dbf3681dc1198a561e..ffc9f038736d89224abb0275d3fe24ceb4a3ed71 100644
--- a/paddlespeech/s2t/modules/ctc.py
+++ b/paddlespeech/s2t/modules/ctc.py
@@ -28,7 +28,7 @@ try:
     from paddlespeech.s2t.decoders.ctcdecoder.swig_wrapper import ctc_beam_search_decoder_batch  # noqa: F401
     from paddlespeech.s2t.decoders.ctcdecoder.swig_wrapper import ctc_greedy_decoder  # noqa: F401
     from paddlespeech.s2t.decoders.ctcdecoder.swig_wrapper import Scorer  # noqa: F401
-except:
+except ImportError:
     try:
         from paddlespeech.s2t.utils import dynamic_pip_install
         package_name = 'paddlespeech_ctcdecoders'
diff --git a/paddlespeech/s2t/training/trainer.py b/paddlespeech/s2t/training/trainer.py
index cc8f50317144b94be19aef424674053b977b1b3b..9bf1ca4db26c42f6c05e57916ffd96a94917da1d 100644
--- a/paddlespeech/s2t/training/trainer.py
+++ b/paddlespeech/s2t/training/trainer.py
@@ -221,6 +221,8 @@ class Trainer():
         if hasattr(self.train_loader, "batch_sampler"):
             batch_sampler = self.train_loader.batch_sampler
             if isinstance(batch_sampler, paddle.io.DistributedBatchSampler):
+                logger.debug(
+                    f"train_loader.batch_sample set epoch: {self.epoch}")
                 batch_sampler.set_epoch(self.epoch)
 
     def before_train(self):
diff --git a/paddlespeech/s2t/transform/perturb.py b/paddlespeech/s2t/transform/perturb.py
index 90144197c2e200756a0572ea799a736ea693e923..226885f36688d7896ed68b602c691d207363f8f3 100644
--- a/paddlespeech/s2t/transform/perturb.py
+++ b/paddlespeech/s2t/transform/perturb.py
@@ -147,7 +147,7 @@ class SpeedPerturbationSox():
 
         try:
             import soxbindings as sox
-        except:
+        except ImportError:
             try:
                 from paddlespeech.s2t.utils import dynamic_pip_install
                 package = "sox"
@@ -155,8 +155,10 @@ class SpeedPerturbationSox():
                 package = "soxbindings"
                 dynamic_pip_install.install(package)
                 import soxbindings as sox
-            except:
-                raise RuntimeError("Can not install soxbindings on your system." )
+            except Exception:
+                raise RuntimeError(
+                    "Can not install soxbindings on your system.")
+        self.sox = sox
 
         if utt2ratio is not None:
             self.utt2ratio = {}
@@ -200,7 +202,7 @@ class SpeedPerturbationSox():
         else:
             ratio = self.state.uniform(self.lower, self.upper)
 
-        tfm = sox.Transformer()
+        tfm = self.sox.Transformer()
         tfm.set_globals(multithread=False)
         tfm.speed(ratio)
         y = tfm.build_array(input_array=x, sample_rate_in=self.sr)
diff --git a/utils/manifest_key_value.py b/utils/manifest_key_value.py
index 3a80090394bf41636eaf92873c4167266e55f2d6..fb3d3aaaf47948428cd5eaf4a9ae6b0fe82b93e1 100755
--- a/utils/manifest_key_value.py
+++ b/utils/manifest_key_value.py
@@ -5,6 +5,7 @@ import functools
 from pathlib import Path
 
 import jsonlines
+
 from utils.utility import add_arguments
 from utils.utility import print_arguments