diff --git a/TTS/bin/compute_attention_masks.py b/TTS/bin/compute_attention_masks.py
index 2ac725bf..0a4337da 100644
--- a/TTS/bin/compute_attention_masks.py
+++ b/TTS/bin/compute_attention_masks.py
@@ -1,12 +1,13 @@
 import argparse
 import importlib
 import os
+from argparse import RawTextHelpFormatter
 
 import numpy as np
 import torch
 from torch.utils.data import DataLoader
 from tqdm import tqdm
-from argparse import RawTextHelpFormatter
+
 from TTS.tts.datasets.TTSDataset import MyDataset
 from TTS.tts.utils.generic_utils import setup_model
 from TTS.tts.utils.io import load_checkpoint
@@ -14,7 +15,6 @@ from TTS.tts.utils.text.symbols import make_symbols, phonemes, symbols
 from TTS.utils.audio import AudioProcessor
 from TTS.utils.io import load_config
 
-
 if __name__ == "__main__":
     # pylint: disable=bad-option-value
     parser = argparse.ArgumentParser(
diff --git a/TTS/bin/compute_embeddings.py b/TTS/bin/compute_embeddings.py
index 36ecb0f0..c38e0e7e 100644
--- a/TTS/bin/compute_embeddings.py
+++ b/TTS/bin/compute_embeddings.py
@@ -3,14 +3,14 @@ import glob
 import os
 
 import numpy as np
+import torch
 from tqdm import tqdm
 
-import torch
 from TTS.speaker_encoder.model import SpeakerEncoder
+from TTS.tts.datasets.preprocess import load_meta_data
+from TTS.tts.utils.speakers import save_speaker_mapping
 from TTS.utils.audio import AudioProcessor
 from TTS.utils.io import load_config
-from TTS.tts.utils.speakers import save_speaker_mapping
-from TTS.tts.datasets.preprocess import load_meta_data
 
 parser = argparse.ArgumentParser(
     description='Compute embedding vectors for each wav file in a dataset. If "target_dataset" is defined, it generates "speakers.json" necessary for training a multi-speaker model.'
diff --git a/TTS/bin/compute_statistics.py b/TTS/bin/compute_statistics.py
index ce224310..9e2b7415 100755
--- a/TTS/bin/compute_statistics.py
+++ b/TTS/bin/compute_statistics.py
@@ -1,16 +1,16 @@
 #!/usr/bin/env python3
 # -*- coding: utf-8 -*-
 
-import os
-import glob
 import argparse
+import glob
+import os
 
 import numpy as np
 from tqdm import tqdm
 
 from TTS.tts.datasets.preprocess import load_meta_data
-from TTS.utils.io import load_config
 from TTS.utils.audio import AudioProcessor
+from TTS.utils.io import load_config
 
 
 def main():
diff --git a/TTS/bin/convert_melgan_tflite.py b/TTS/bin/convert_melgan_tflite.py
index 06784abe..a3a3fb66 100644
--- a/TTS/bin/convert_melgan_tflite.py
+++ b/TTS/bin/convert_melgan_tflite.py
@@ -7,7 +7,6 @@ from TTS.vocoder.tf.utils.generic_utils import setup_generator
 from TTS.vocoder.tf.utils.io import load_checkpoint
 from TTS.vocoder.tf.utils.tflite import convert_melgan_to_tflite
 
-
 parser = argparse.ArgumentParser()
 parser.add_argument("--tf_model", type=str, help="Path to target torch model to be converted to TF.")
 parser.add_argument("--config_path", type=str, help="Path to config file of torch model.")
diff --git a/TTS/bin/convert_melgan_torch_to_tf.py b/TTS/bin/convert_melgan_torch_to_tf.py
index 176bb992..ba8e186a 100644
--- a/TTS/bin/convert_melgan_torch_to_tf.py
+++ b/TTS/bin/convert_melgan_torch_to_tf.py
@@ -1,17 +1,14 @@
 import argparse
-from difflib import SequenceMatcher
 import os
+from difflib import SequenceMatcher
 
 import numpy as np
 import tensorflow as tf
 import torch
 
 from TTS.utils.io import load_config
-from TTS.vocoder.tf.utils.convert_torch_to_tf_utils import (
-    compare_torch_tf,
-    convert_tf_name,
-    transfer_weights_torch_to_tf,
-)
+from TTS.vocoder.tf.utils.convert_torch_to_tf_utils import (compare_torch_tf, convert_tf_name,
+                                                            transfer_weights_torch_to_tf)
 from TTS.vocoder.tf.utils.generic_utils import setup_generator as setup_tf_generator
 from TTS.vocoder.tf.utils.io import save_checkpoint
 from TTS.vocoder.utils.generic_utils import setup_generator
diff --git a/TTS/bin/convert_tacotron2_tflite.py b/TTS/bin/convert_tacotron2_tflite.py
index 2a7926a8..327d0ae8 100644
--- a/TTS/bin/convert_tacotron2_tflite.py
+++ b/TTS/bin/convert_tacotron2_tflite.py
@@ -2,12 +2,11 @@
 
 import argparse
 
-from TTS.utils.io import load_config
-from TTS.tts.utils.text.symbols import symbols, phonemes
 from TTS.tts.tf.utils.generic_utils import setup_model
 from TTS.tts.tf.utils.io import load_checkpoint
 from TTS.tts.tf.utils.tflite import convert_tacotron2_to_tflite
-
+from TTS.tts.utils.text.symbols import phonemes, symbols
+from TTS.utils.io import load_config
 
 parser = argparse.ArgumentParser()
 parser.add_argument("--tf_model", type=str, help="Path to target torch model to be converted to TF.")
diff --git a/TTS/bin/convert_tacotron2_torch_to_tf.py b/TTS/bin/convert_tacotron2_torch_to_tf.py
index b4aafa9e..d523d01e 100644
--- a/TTS/bin/convert_tacotron2_torch_to_tf.py
+++ b/TTS/bin/convert_tacotron2_torch_to_tf.py
@@ -1,12 +1,13 @@
 import argparse
-from difflib import SequenceMatcher
 import os
 import sys
+from difflib import SequenceMatcher
 from pprint import pprint
 
 import numpy as np
 import tensorflow as tf
 import torch
+
 from TTS.tts.tf.models.tacotron2 import Tacotron2
 from TTS.tts.tf.utils.convert_torch_to_tf_utils import compare_torch_tf, convert_tf_name, transfer_weights_torch_to_tf
 from TTS.tts.tf.utils.generic_utils import save_checkpoint
diff --git a/TTS/bin/distribute.py b/TTS/bin/distribute.py
index 6b1c6fd6..0bd27275 100644
--- a/TTS/bin/distribute.py
+++ b/TTS/bin/distribute.py
@@ -1,12 +1,13 @@
 #!/usr/bin/env python3
 # -*- coding: utf-8 -*-
 
-import os
-import sys
-import pathlib
-import time
-import subprocess
 import argparse
+import os
+import pathlib
+import subprocess
+import sys
+import time
+
 import torch
 
 
diff --git a/TTS/bin/find_unique_chars.py b/TTS/bin/find_unique_chars.py
index b7056e01..7891d65a 100644
--- a/TTS/bin/find_unique_chars.py
+++ b/TTS/bin/find_unique_chars.py
@@ -1,6 +1,6 @@
 """Find all the unique characters in a dataset"""
-import os
 import argparse
+import os
 from argparse import RawTextHelpFormatter
 
 from TTS.tts.datasets.preprocess import get_preprocessor_by_name
diff --git a/TTS/bin/resample.py b/TTS/bin/resample.py
index 7d358d4d..f1e416b4 100644
--- a/TTS/bin/resample.py
+++ b/TTS/bin/resample.py
@@ -1,10 +1,11 @@
 import argparse
 import glob
 import os
-import librosa
-from distutils.dir_util import copy_tree
 from argparse import RawTextHelpFormatter
+from distutils.dir_util import copy_tree
 from multiprocessing import Pool
+
+import librosa
 from tqdm import tqdm
 
 
diff --git a/TTS/bin/synthesize.py b/TTS/bin/synthesize.py
index aca245bb..bec41a60 100755
--- a/TTS/bin/synthesize.py
+++ b/TTS/bin/synthesize.py
@@ -4,7 +4,6 @@
 import argparse
 import sys
 from argparse import RawTextHelpFormatter
-
 # pylint: disable=redefined-outer-name, unused-argument
 from pathlib import Path
 
diff --git a/TTS/bin/train_align_tts.py b/TTS/bin/train_align_tts.py
index 16940f1e..6f268ed3 100644
--- a/TTS/bin/train_align_tts.py
+++ b/TTS/bin/train_align_tts.py
@@ -12,6 +12,7 @@ import torch
 from torch.nn.parallel import DistributedDataParallel as DDP_th
 from torch.utils.data import DataLoader
 from torch.utils.data.distributed import DistributedSampler
+
 from TTS.tts.datasets.preprocess import load_meta_data
 from TTS.tts.datasets.TTSDataset import MyDataset
 from TTS.tts.layers.losses import AlignTTSLoss
diff --git a/TTS/bin/train_encoder.py b/TTS/bin/train_encoder.py
index a2d917ac..5a3f59af 100644
--- a/TTS/bin/train_encoder.py
+++ b/TTS/bin/train_encoder.py
@@ -9,6 +9,7 @@ import traceback
 
 import torch
 from torch.utils.data import DataLoader
+
 from TTS.speaker_encoder.dataset import MyDataset
 from TTS.speaker_encoder.losses import AngleProtoLoss, GE2ELoss
 from TTS.speaker_encoder.model import SpeakerEncoder
@@ -16,13 +17,8 @@ from TTS.speaker_encoder.utils.generic_utils import check_config_speaker_encoder
 from TTS.speaker_encoder.utils.visual import plot_embeddings
 from TTS.tts.datasets.preprocess import load_meta_data
 from TTS.utils.audio import AudioProcessor
-from TTS.utils.generic_utils import (
-    count_parameters,
-    create_experiment_folder,
-    get_git_branch,
-    remove_experiment_folder,
-    set_init_dict,
-)
+from TTS.utils.generic_utils import (count_parameters, create_experiment_folder, get_git_branch,
+                                     remove_experiment_folder, set_init_dict)
 from TTS.utils.io import copy_model_files, load_config
 from TTS.utils.radam import RAdam
 from TTS.utils.tensorboard_logger import TensorboardLogger
diff --git a/TTS/bin/train_glow_tts.py b/TTS/bin/train_glow_tts.py
index 01b62c14..ec27574c 100644
--- a/TTS/bin/train_glow_tts.py
+++ b/TTS/bin/train_glow_tts.py
@@ -8,13 +8,11 @@ import traceback
 from random import randrange
 
 import torch
-
 # DISTRIBUTED
 from torch.nn.parallel import DistributedDataParallel as DDP_th
 from torch.utils.data import DataLoader
 from torch.utils.data.distributed import DistributedSampler
 
-from TTS.utils.arguments import parse_arguments, process_args
 from TTS.tts.datasets.preprocess import load_meta_data
 from TTS.tts.datasets.TTSDataset import MyDataset
 from TTS.tts.layers.losses import GlowTTSLoss
@@ -25,6 +23,7 @@ from TTS.tts.utils.speakers import parse_speakers
 from TTS.tts.utils.synthesis import synthesis
 from TTS.tts.utils.text.symbols import make_symbols, phonemes, symbols
 from TTS.tts.utils.visual import plot_alignment, plot_spectrogram
+from TTS.utils.arguments import parse_arguments, process_args
 from TTS.utils.audio import AudioProcessor
 from TTS.utils.distribute import init_distributed, reduce_tensor
 from TTS.utils.generic_utils import KeepAverage, count_parameters, remove_experiment_folder, set_init_dict
diff --git a/TTS/bin/train_speedy_speech.py b/TTS/bin/train_speedy_speech.py
index 7959c3c1..d27af5a8 100644
--- a/TTS/bin/train_speedy_speech.py
+++ b/TTS/bin/train_speedy_speech.py
@@ -5,16 +5,15 @@ import os
 import sys
 import time
 import traceback
-import numpy as np
 from random import randrange
 
+import numpy as np
 import torch
-from TTS.utils.arguments import parse_arguments, process_args
-
 # DISTRIBUTED
 from torch.nn.parallel import DistributedDataParallel as DDP_th
 from torch.utils.data import DataLoader
 from torch.utils.data.distributed import DistributedSampler
+
 from TTS.tts.datasets.preprocess import load_meta_data
 from TTS.tts.datasets.TTSDataset import MyDataset
 from TTS.tts.layers.losses import SpeedySpeechLoss
@@ -25,6 +24,7 @@ from TTS.tts.utils.speakers import parse_speakers
 from TTS.tts.utils.synthesis import synthesis
 from TTS.tts.utils.text.symbols import make_symbols, phonemes, symbols
 from TTS.tts.utils.visual import plot_alignment, plot_spectrogram
+from TTS.utils.arguments import parse_arguments, process_args
 from TTS.utils.audio import AudioProcessor
 from TTS.utils.distribute import init_distributed, reduce_tensor
 from TTS.utils.generic_utils import KeepAverage, count_parameters, remove_experiment_folder, set_init_dict
diff --git a/TTS/bin/train_tacotron.py b/TTS/bin/train_tacotron.py
index cf5552fc..aee13cac 100644
--- a/TTS/bin/train_tacotron.py
+++ b/TTS/bin/train_tacotron.py
@@ -10,7 +10,7 @@ from random import randrange
 import numpy as np
 import torch
 from torch.utils.data import DataLoader
-from TTS.utils.arguments import parse_arguments, process_args
+
 from TTS.tts.datasets.preprocess import load_meta_data
 from TTS.tts.datasets.TTSDataset import MyDataset
 from TTS.tts.layers.losses import TacotronLoss
@@ -21,18 +21,13 @@ from TTS.tts.utils.speakers import parse_speakers
 from TTS.tts.utils.synthesis import synthesis
 from TTS.tts.utils.text.symbols import make_symbols, phonemes, symbols
 from TTS.tts.utils.visual import plot_alignment, plot_spectrogram
+from TTS.utils.arguments import parse_arguments, process_args
 from TTS.utils.audio import AudioProcessor
 from TTS.utils.distribute import DistributedSampler, apply_gradient_allreduce, init_distributed, reduce_tensor
 from TTS.utils.generic_utils import KeepAverage, count_parameters, remove_experiment_folder, set_init_dict
 from TTS.utils.radam import RAdam
-from TTS.utils.training import (
-    NoamLR,
-    adam_weight_decay,
-    check_update,
-    gradual_training_scheduler,
-    set_weight_decay,
-    setup_torch_training_env,
-)
+from TTS.utils.training import (NoamLR, adam_weight_decay, check_update, gradual_training_scheduler, set_weight_decay,
+                                setup_torch_training_env)
 
 use_cuda, num_gpus = setup_torch_training_env(True, False)
 
diff --git a/TTS/bin/train_vocoder_gan.py b/TTS/bin/train_vocoder_gan.py
index 628a1f4c..6546e6ed 100644
--- a/TTS/bin/train_vocoder_gan.py
+++ b/TTS/bin/train_vocoder_gan.py
@@ -9,13 +9,16 @@ import traceback
 from inspect import signature
 
 import torch
+# DISTRIBUTED
+from torch.nn.parallel import DistributedDataParallel as DDP_th
 from torch.utils.data import DataLoader
+from torch.utils.data.distributed import DistributedSampler
+
 from TTS.utils.arguments import parse_arguments, process_args
 from TTS.utils.audio import AudioProcessor
+from TTS.utils.distribute import init_distributed
 from TTS.utils.generic_utils import KeepAverage, count_parameters, remove_experiment_folder, set_init_dict
-
 from TTS.utils.radam import RAdam
-
 from TTS.utils.training import setup_torch_training_env
 from TTS.vocoder.datasets.gan_dataset import GANDataset
 from TTS.vocoder.datasets.preprocess import load_wav_data, load_wav_feat_data
@@ -23,11 +26,6 @@ from TTS.vocoder.layers.losses import DiscriminatorLoss, GeneratorLoss
 from TTS.vocoder.utils.generic_utils import plot_results, setup_discriminator, setup_generator
 from TTS.vocoder.utils.io import save_best_model, save_checkpoint
 
-# DISTRIBUTED
-from torch.nn.parallel import DistributedDataParallel as DDP_th
-from torch.utils.data.distributed import DistributedSampler
-from TTS.utils.distribute import init_distributed
-
 use_cuda, num_gpus = setup_torch_training_env(True, True)
 
 
diff --git a/TTS/bin/train_vocoder_wavegrad.py b/TTS/bin/train_vocoder_wavegrad.py
index e5ade7b8..104e18de 100644
--- a/TTS/bin/train_vocoder_wavegrad.py
+++ b/TTS/bin/train_vocoder_wavegrad.py
@@ -5,15 +5,15 @@ import os
 import sys
 import time
 import traceback
+
 import numpy as np
-
 import torch
-
 # DISTRIBUTED
 from torch.nn.parallel import DistributedDataParallel as DDP_th
 from torch.optim import Adam
 from torch.utils.data import DataLoader
 from torch.utils.data.distributed import DistributedSampler
+
 from TTS.utils.arguments import parse_arguments, process_args
 from TTS.utils.audio import AudioProcessor
 from TTS.utils.distribute import init_distributed
diff --git a/TTS/bin/train_vocoder_wavernn.py b/TTS/bin/train_vocoder_wavernn.py
index 25129883..3f6f5836 100644
--- a/TTS/bin/train_vocoder_wavernn.py
+++ b/TTS/bin/train_vocoder_wavernn.py
@@ -2,33 +2,29 @@
 """Train WaveRNN vocoder model."""
 
 import os
-import sys
-import traceback
-import time
 import random
+import sys
+import time
+import traceback
 
 import torch
 from torch.utils.data import DataLoader
 
-# from torch.utils.data.distributed import DistributedSampler
-
-from TTS.utils.arguments import parse_arguments, process_args
 from TTS.tts.utils.visual import plot_spectrogram
+from TTS.utils.arguments import parse_arguments, process_args
 from TTS.utils.audio import AudioProcessor
+from TTS.utils.generic_utils import KeepAverage, count_parameters, remove_experiment_folder, set_init_dict
 from TTS.utils.radam import RAdam
 from TTS.utils.training import setup_torch_training_env
-from TTS.utils.generic_utils import (
-    KeepAverage,
-    count_parameters,
-    remove_experiment_folder,
-    set_init_dict,
-)
-from TTS.vocoder.datasets.wavernn_dataset import WaveRNNDataset
 from TTS.vocoder.datasets.preprocess import load_wav_data, load_wav_feat_data
+from TTS.vocoder.datasets.wavernn_dataset import WaveRNNDataset
 from TTS.vocoder.utils.distribution import discretized_mix_logistic_loss, gaussian_loss
 from TTS.vocoder.utils.generic_utils import setup_generator
 from TTS.vocoder.utils.io import save_best_model, save_checkpoint
 
+# from torch.utils.data.distributed import DistributedSampler
+
+
 
 use_cuda, num_gpus = setup_torch_training_env(True, True)
 
diff --git a/TTS/bin/tune_wavegrad.py b/TTS/bin/tune_wavegrad.py
index d0f64214..a31d6c45 100644
--- a/TTS/bin/tune_wavegrad.py
+++ b/TTS/bin/tune_wavegrad.py
@@ -6,6 +6,7 @@ import numpy as np
 import torch
 from torch.utils.data import DataLoader
 from tqdm import tqdm
+
 from TTS.utils.audio import AudioProcessor
 from TTS.utils.io import load_config
 from TTS.vocoder.datasets.preprocess import load_wav_data
diff --git a/TTS/server/server.py b/TTS/server/server.py
index 106c282c..9e533dc6 100644
--- a/TTS/server/server.py
+++ b/TTS/server/server.py
@@ -1,14 +1,15 @@
 #!flask/bin/python
 import argparse
+import io
 import os
 import sys
-import io
 from pathlib import Path
 
 from flask import Flask, render_template, request, send_file
-from TTS.utils.synthesizer import Synthesizer
-from TTS.utils.manage import ModelManager
+
 from TTS.utils.io import load_config
+from TTS.utils.manage import ModelManager
+from TTS.utils.synthesizer import Synthesizer
 
 
 def create_argparser():
diff --git a/TTS/speaker_encoder/utils/generic_utils.py b/TTS/speaker_encoder/utils/generic_utils.py
index 38f9870d..c9bfa679 100644
--- a/TTS/speaker_encoder/utils/generic_utils.py
+++ b/TTS/speaker_encoder/utils/generic_utils.py
@@ -3,6 +3,7 @@ import os
 import re
 
 import torch
+
 from TTS.speaker_encoder.model import SpeakerEncoder
 from TTS.utils.generic_utils import check_argument
 
diff --git a/TTS/speaker_encoder/utils/prepare_voxceleb.py b/TTS/speaker_encoder/utils/prepare_voxceleb.py
index 58ff9dad..7bcbaf95 100644
--- a/TTS/speaker_encoder/utils/prepare_voxceleb.py
+++ b/TTS/speaker_encoder/utils/prepare_voxceleb.py
@@ -19,15 +19,17 @@
 # pylint: disable=too-many-locals, too-many-statements, too-many-arguments, too-many-instance-attributes
 """ voxceleb 1 & 2 """
 
+import hashlib
 import os
+import subprocess
 import sys
 import zipfile
-import subprocess
-import hashlib
-import pandas
-from absl import logging
-import tensorflow as tf
+
 import soundfile as sf
+import tensorflow as tf
+from absl import logging
+
+import pandas
 
 gfile = tf.compat.v1.gfile
 
diff --git a/TTS/speaker_encoder/utils/visual.py b/TTS/speaker_encoder/utils/visual.py
index 68c48f12..4f40f68c 100644
--- a/TTS/speaker_encoder/utils/visual.py
+++ b/TTS/speaker_encoder/utils/visual.py
@@ -1,7 +1,7 @@
-import umap
-import numpy as np
 import matplotlib
 import matplotlib.pyplot as plt
+import numpy as np
+import umap
 
 matplotlib.use("Agg")
 
diff --git a/TTS/tts/datasets/TTSDataset.py b/TTS/tts/datasets/TTSDataset.py
index 3c791625..b613e37c 100644
--- a/TTS/tts/datasets/TTSDataset.py
+++ b/TTS/tts/datasets/TTSDataset.py
@@ -7,6 +7,7 @@ import numpy as np
 import torch
 import tqdm
 from torch.utils.data import Dataset
+
 from TTS.tts.utils.data import prepare_data, prepare_stop_target, prepare_tensor
 from TTS.tts.utils.text import pad_with_eos_bos, phoneme_to_sequence, text_to_sequence
 
diff --git a/TTS/tts/datasets/preprocess.py b/TTS/tts/datasets/preprocess.py
index 14c7d4c5..0f82814d 100644
--- a/TTS/tts/datasets/preprocess.py
+++ b/TTS/tts/datasets/preprocess.py
@@ -7,6 +7,7 @@ from pathlib import Path
 from typing import List
 
 from tqdm import tqdm
+
 from TTS.tts.utils.generic_utils import split_dataset
 
 ####################
diff --git a/TTS/tts/layers/align_tts/duration_predictor.py b/TTS/tts/layers/align_tts/duration_predictor.py
index 83916464..b2b83894 100644
--- a/TTS/tts/layers/align_tts/duration_predictor.py
+++ b/TTS/tts/layers/align_tts/duration_predictor.py
@@ -1,6 +1,7 @@
 from torch import nn
-from TTS.tts.layers.generic.transformer import FFTransformerBlock
+
 from TTS.tts.layers.generic.pos_encoding import PositionalEncoding
+from TTS.tts.layers.generic.transformer import FFTransformerBlock
 
 
 class DurationPredictor(nn.Module):
diff --git a/TTS/tts/layers/feed_forward/decoder.py b/TTS/tts/layers/feed_forward/decoder.py
index 7e145a6c..34c586aa 100644
--- a/TTS/tts/layers/feed_forward/decoder.py
+++ b/TTS/tts/layers/feed_forward/decoder.py
@@ -1,9 +1,10 @@
 import torch
 from torch import nn
-from TTS.tts.layers.generic.res_conv_bn import Conv1dBNBlock, ResidualConv1dBNBlock, Conv1dBN
+
+from TTS.tts.layers.generic.res_conv_bn import Conv1dBN, Conv1dBNBlock, ResidualConv1dBNBlock
+from TTS.tts.layers.generic.transformer import FFTransformerBlock
 from TTS.tts.layers.generic.wavenet import WNBlocks
 from TTS.tts.layers.glow_tts.transformer import RelativePositionTransformer
-from TTS.tts.layers.generic.transformer import FFTransformerBlock
 
 
 class WaveNetDecoder(nn.Module):
diff --git a/TTS/tts/layers/feed_forward/encoder.py b/TTS/tts/layers/feed_forward/encoder.py
index a50898a4..bb87ffbb 100644
--- a/TTS/tts/layers/feed_forward/encoder.py
+++ b/TTS/tts/layers/feed_forward/encoder.py
@@ -1,8 +1,8 @@
 from torch import nn
 
-from TTS.tts.layers.glow_tts.transformer import RelativePositionTransformer
 from TTS.tts.layers.generic.res_conv_bn import ResidualConv1dBNBlock
 from TTS.tts.layers.generic.transformer import FFTransformerBlock
+from TTS.tts.layers.glow_tts.transformer import RelativePositionTransformer
 
 
 class RelativePositionTransformerEncoder(nn.Module):
diff --git a/TTS/tts/layers/generic/pos_encoding.py b/TTS/tts/layers/generic/pos_encoding.py
index a1eaacea..46a0b516 100644
--- a/TTS/tts/layers/generic/pos_encoding.py
+++ b/TTS/tts/layers/generic/pos_encoding.py
@@ -1,6 +1,6 @@
-import torch
 import math
 
+import torch
 from torch import nn
 
 
diff --git a/TTS/tts/layers/glow_tts/decoder.py b/TTS/tts/layers/glow_tts/decoder.py
index 3cfcf461..7b3f0ed1 100644
--- a/TTS/tts/layers/glow_tts/decoder.py
+++ b/TTS/tts/layers/glow_tts/decoder.py
@@ -1,8 +1,8 @@
 import torch
 from torch import nn
 
-from TTS.tts.layers.glow_tts.glow import InvConvNear, CouplingBlock
 from TTS.tts.layers.generic.normalization import ActNorm
+from TTS.tts.layers.glow_tts.glow import CouplingBlock, InvConvNear
 
 
 def squeeze(x, x_mask=None, num_sqz=2):
diff --git a/TTS/tts/layers/glow_tts/encoder.py b/TTS/tts/layers/glow_tts/encoder.py
index e7c1205f..48bb3008 100644
--- a/TTS/tts/layers/glow_tts/encoder.py
+++ b/TTS/tts/layers/glow_tts/encoder.py
@@ -1,14 +1,15 @@
 import math
+
 import torch
 from torch import nn
 
-from TTS.tts.layers.glow_tts.transformer import RelativePositionTransformer
 from TTS.tts.layers.generic.gated_conv import GatedConvBlock
-from TTS.tts.utils.generic_utils import sequence_mask
-from TTS.tts.layers.glow_tts.glow import ResidualConv1dLayerNormBlock
-from TTS.tts.layers.glow_tts.duration_predictor import DurationPredictor
-from TTS.tts.layers.generic.time_depth_sep_conv import TimeDepthSeparableConvBlock
 from TTS.tts.layers.generic.res_conv_bn import ResidualConv1dBNBlock
+from TTS.tts.layers.generic.time_depth_sep_conv import TimeDepthSeparableConvBlock
+from TTS.tts.layers.glow_tts.duration_predictor import DurationPredictor
+from TTS.tts.layers.glow_tts.glow import ResidualConv1dLayerNormBlock
+from TTS.tts.layers.glow_tts.transformer import RelativePositionTransformer
+from TTS.tts.utils.generic_utils import sequence_mask
 
 
 class Encoder(nn.Module):
diff --git a/TTS/tts/layers/glow_tts/glow.py b/TTS/tts/layers/glow_tts/glow.py
index d279ad77..18c491e3 100644
--- a/TTS/tts/layers/glow_tts/glow.py
+++ b/TTS/tts/layers/glow_tts/glow.py
@@ -1,6 +1,7 @@
 import torch
 from torch import nn
 from torch.nn import functional as F
+
 from TTS.tts.layers.generic.wavenet import WN
 
 from ..generic.normalization import LayerNorm
diff --git a/TTS/tts/layers/glow_tts/monotonic_align/__init__.py b/TTS/tts/layers/glow_tts/monotonic_align/__init__.py
index 9673e9a2..7be124f4 100644
--- a/TTS/tts/layers/glow_tts/monotonic_align/__init__.py
+++ b/TTS/tts/layers/glow_tts/monotonic_align/__init__.py
@@ -1,6 +1,7 @@
 import numpy as np
 import torch
 from torch.nn import functional as F
+
 from TTS.tts.utils.generic_utils import sequence_mask
 
 try:
diff --git a/TTS/tts/layers/glow_tts/transformer.py b/TTS/tts/layers/glow_tts/transformer.py
index 78b5b2f4..1a67d0ba 100644
--- a/TTS/tts/layers/glow_tts/transformer.py
+++ b/TTS/tts/layers/glow_tts/transformer.py
@@ -1,4 +1,5 @@
 import math
+
 import torch
 from torch import nn
 from torch.nn import functional as F
diff --git a/TTS/tts/layers/losses.py b/TTS/tts/layers/losses.py
index 00399514..729a21af 100644
--- a/TTS/tts/layers/losses.py
+++ b/TTS/tts/layers/losses.py
@@ -1,8 +1,10 @@
 import math
+
 import numpy as np
 import torch
 from torch import nn
 from torch.nn import functional
+
 from TTS.tts.utils.generic_utils import sequence_mask
 from TTS.tts.utils.ssim import ssim
 
diff --git a/TTS/tts/layers/tacotron/attentions.py b/TTS/tts/layers/tacotron/attentions.py
index 320a8509..a01ccc49 100644
--- a/TTS/tts/layers/tacotron/attentions.py
+++ b/TTS/tts/layers/tacotron/attentions.py
@@ -1,9 +1,9 @@
 import torch
+from scipy.stats import betabinom
 from torch import nn
 from torch.nn import functional as F
 
 from TTS.tts.layers.tacotron.common_layers import Linear
-from scipy.stats import betabinom
 
 
 class LocationLayer(nn.Module):
diff --git a/TTS/tts/layers/tacotron/tacotron.py b/TTS/tts/layers/tacotron/tacotron.py
index 5ff9ed1d..153af5b7 100644
--- a/TTS/tts/layers/tacotron/tacotron.py
+++ b/TTS/tts/layers/tacotron/tacotron.py
@@ -1,8 +1,9 @@
 # coding: utf-8
 import torch
 from torch import nn
-from .common_layers import Prenet
+
 from .attentions import init_attn
+from .common_layers import Prenet
 
 
 class BatchNormConv1d(nn.Module):
diff --git a/TTS/tts/layers/tacotron/tacotron2.py b/TTS/tts/layers/tacotron/tacotron2.py
index 755598c6..df14aead 100644
--- a/TTS/tts/layers/tacotron/tacotron2.py
+++ b/TTS/tts/layers/tacotron/tacotron2.py
@@ -1,8 +1,10 @@
 import torch
 from torch import nn
 from torch.nn import functional as F
-from .common_layers import Prenet, Linear
+
 from .attentions import init_attn
+from .common_layers import Linear, Prenet
+
 
 # NOTE: linter has a problem with the current TF release
 # pylint: disable=no-value-for-parameter
diff --git a/TTS/tts/models/align_tts.py b/TTS/tts/models/align_tts.py
index 903b99c8..e097ac50 100644
--- a/TTS/tts/models/align_tts.py
+++ b/TTS/tts/models/align_tts.py
@@ -1,12 +1,13 @@
 import torch
 import torch.nn as nn
-from TTS.tts.layers.generic.pos_encoding import PositionalEncoding
+
+from TTS.tts.layers.align_tts.mdn import MDNBlock
+from TTS.tts.layers.feed_forward.decoder import Decoder
 from TTS.tts.layers.feed_forward.duration_predictor import DurationPredictor
+from TTS.tts.layers.feed_forward.encoder import Encoder
+from TTS.tts.layers.generic.pos_encoding import PositionalEncoding
 from TTS.tts.layers.glow_tts.monotonic_align import generate_path, maximum_path
 from TTS.tts.utils.generic_utils import sequence_mask
-from TTS.tts.layers.align_tts.mdn import MDNBlock
-from TTS.tts.layers.feed_forward.encoder import Encoder
-from TTS.tts.layers.feed_forward.decoder import Decoder
 
 
 class AlignTTS(nn.Module):
diff --git a/TTS/tts/models/glow_tts.py b/TTS/tts/models/glow_tts.py
index 77222cba..0717e2a8 100644
--- a/TTS/tts/models/glow_tts.py
+++ b/TTS/tts/models/glow_tts.py
@@ -1,12 +1,13 @@
 import math
+
 import torch
 from torch import nn
 from torch.nn import functional as F
 
-from TTS.tts.layers.glow_tts.encoder import Encoder
 from TTS.tts.layers.glow_tts.decoder import Decoder
+from TTS.tts.layers.glow_tts.encoder import Encoder
+from TTS.tts.layers.glow_tts.monotonic_align import generate_path, maximum_path
 from TTS.tts.utils.generic_utils import sequence_mask
-from TTS.tts.layers.glow_tts.monotonic_align import maximum_path, generate_path
 
 
 class GlowTTS(nn.Module):
diff --git a/TTS/tts/models/speedy_speech.py b/TTS/tts/models/speedy_speech.py
index 0bad9ede..9880b82b 100644
--- a/TTS/tts/models/speedy_speech.py
+++ b/TTS/tts/models/speedy_speech.py
@@ -1,11 +1,12 @@
 import torch
 from torch import nn
+
 from TTS.tts.layers.feed_forward.decoder import Decoder
 from TTS.tts.layers.feed_forward.duration_predictor import DurationPredictor
 from TTS.tts.layers.feed_forward.encoder import Encoder
 from TTS.tts.layers.generic.pos_encoding import PositionalEncoding
-from TTS.tts.utils.generic_utils import sequence_mask
 from TTS.tts.layers.glow_tts.monotonic_align import generate_path
+from TTS.tts.utils.generic_utils import sequence_mask
 
 
 class SpeedySpeech(nn.Module):
diff --git a/TTS/tts/models/tacotron2.py b/TTS/tts/models/tacotron2.py
index 25386fca..c9750807 100644
--- a/TTS/tts/models/tacotron2.py
+++ b/TTS/tts/models/tacotron2.py
@@ -5,6 +5,7 @@ from TTS.tts.layers.tacotron.gst_layers import GST
 from TTS.tts.layers.tacotron.tacotron2 import Decoder, Encoder, Postnet
 from TTS.tts.models.tacotron_abstract import TacotronAbstract
 
+
 # TODO: match function arguments with tacotron
 class Tacotron2(TacotronAbstract):
     """Tacotron2 as in https://arxiv.org/abs/1712.05884
diff --git a/TTS/tts/tf/layers/tacotron/tacotron2.py b/TTS/tts/tf/layers/tacotron/tacotron2.py
index 3247a8c4..1fe679d2 100644
--- a/TTS/tts/tf/layers/tacotron/tacotron2.py
+++ b/TTS/tts/tf/layers/tacotron/tacotron2.py
@@ -1,7 +1,8 @@
 import tensorflow as tf
 from tensorflow import keras
+
+from TTS.tts.tf.layers.tacotron.common_layers import Attention, Prenet
 from TTS.tts.tf.utils.tf_utils import shape_list
-from TTS.tts.tf.layers.tacotron.common_layers import Prenet, Attention
 
 
 # NOTE: linter has a problem with the current TF release
diff --git a/TTS/tts/tf/models/tacotron2.py b/TTS/tts/tf/models/tacotron2.py
index 5a0c1977..9cc62070 100644
--- a/TTS/tts/tf/models/tacotron2.py
+++ b/TTS/tts/tf/models/tacotron2.py
@@ -1,7 +1,7 @@
 import tensorflow as tf
 from tensorflow import keras
 
-from TTS.tts.tf.layers.tacotron.tacotron2 import Encoder, Decoder, Postnet
+from TTS.tts.tf.layers.tacotron.tacotron2 import Decoder, Encoder, Postnet
 from TTS.tts.tf.utils.tf_utils import shape_list
 
 
diff --git a/TTS/tts/tf/utils/generic_utils.py b/TTS/tts/tf/utils/generic_utils.py
index 8956b47e..5b8b4ce2 100644
--- a/TTS/tts/tf/utils/generic_utils.py
+++ b/TTS/tts/tf/utils/generic_utils.py
@@ -1,6 +1,7 @@
 import datetime
 import importlib
 import pickle
+
 import numpy as np
 import tensorflow as tf
 
diff --git a/TTS/tts/tf/utils/io.py b/TTS/tts/tf/utils/io.py
index 06c1c9fb..b2345b00 100644
--- a/TTS/tts/tf/utils/io.py
+++ b/TTS/tts/tf/utils/io.py
@@ -1,5 +1,6 @@
-import pickle
 import datetime
+import pickle
+
 import tensorflow as tf
 
 
diff --git a/TTS/tts/utils/chinese_mandarin/numbers.py b/TTS/tts/utils/chinese_mandarin/numbers.py
index adb21142..4787ea61 100644
--- a/TTS/tts/utils/chinese_mandarin/numbers.py
+++ b/TTS/tts/utils/chinese_mandarin/numbers.py
@@ -5,8 +5,8 @@
 # This uses Python 3, but it's easy to port to Python 2 by changing
 # strings to u'xx'.
 
-import re
 import itertools
+import re
 
 
 def _num2chinese(num: str, big=False, simp=True, o=False, twoalt=False) -> str:
diff --git a/TTS/tts/utils/chinese_mandarin/phonemizer.py b/TTS/tts/utils/chinese_mandarin/phonemizer.py
index 7e46edf6..29cac160 100644
--- a/TTS/tts/utils/chinese_mandarin/phonemizer.py
+++ b/TTS/tts/utils/chinese_mandarin/phonemizer.py
@@ -1,13 +1,11 @@
 from typing import List
 
+import jieba
 import pypinyin
 
 from .pinyinToPhonemes import PINYIN_DICT
 
 
-import jieba
-
-
 def _chinese_character_to_pinyin(text: str) -> List[str]:
     pinyins = pypinyin.pinyin(text, style=pypinyin.Style.TONE3, heteronym=False, neutral_tone_with_five=True)
     pinyins_flat_list = [item for sublist in pinyins for item in sublist]
diff --git a/TTS/tts/utils/generic_utils.py b/TTS/tts/utils/generic_utils.py
index 6e566f10..8c23dd84 100644
--- a/TTS/tts/utils/generic_utils.py
+++ b/TTS/tts/utils/generic_utils.py
@@ -1,9 +1,10 @@
-import re
-import torch
 import importlib
-import numpy as np
+import re
 from collections import Counter
 
+import numpy as np
+import torch
+
 from TTS.utils.generic_utils import check_argument
 
 
diff --git a/TTS/tts/utils/io.py b/TTS/tts/utils/io.py
index 32b5c766..bb8432fa 100644
--- a/TTS/tts/utils/io.py
+++ b/TTS/tts/utils/io.py
@@ -1,8 +1,9 @@
-import os
-import torch
 import datetime
+import os
 import pickle as pickle_tts
 
+import torch
+
 from TTS.utils.io import RenamingUnpickler
 
 
diff --git a/TTS/tts/utils/speakers.py b/TTS/tts/utils/speakers.py
index 224667dd..cb2827fd 100644
--- a/TTS/tts/utils/speakers.py
+++ b/TTS/tts/utils/speakers.py
@@ -1,5 +1,5 @@
-import os
 import json
+import os
 
 
 def make_speakers_json_path(out_path):
diff --git a/TTS/tts/utils/synthesis.py b/TTS/tts/utils/synthesis.py
index 4621961f..8dd33dc7 100644
--- a/TTS/tts/utils/synthesis.py
+++ b/TTS/tts/utils/synthesis.py
@@ -1,14 +1,16 @@
 import os
 
-os.environ["TF_CPP_MIN_LOG_LEVEL"] = "3"
+import numpy as np
 import pkg_resources
+import torch
+
+from .text import phoneme_to_sequence, text_to_sequence
+
+os.environ["TF_CPP_MIN_LOG_LEVEL"] = "3"
 
 installed = {pkg.key for pkg in pkg_resources.working_set}  # pylint: disable=not-an-iterable
 if "tensorflow" in installed or "tensorflow-gpu" in installed:
     import tensorflow as tf
-import torch
-import numpy as np
-from .text import text_to_sequence, phoneme_to_sequence
 
 
 def text_to_seqvec(text, CONFIG):
diff --git a/TTS/tts/utils/text/__init__.py b/TTS/tts/utils/text/__init__.py
index 6d1dc9a0..64d15b01 100644
--- a/TTS/tts/utils/text/__init__.py
+++ b/TTS/tts/utils/text/__init__.py
@@ -5,10 +5,10 @@ import re
 import phonemizer
 from packaging import version
 from phonemizer.phonemize import phonemize
+
+from TTS.tts.utils.chinese_mandarin.phonemizer import chinese_text_to_phonemes
 from TTS.tts.utils.text import cleaners
 from TTS.tts.utils.text.symbols import _bos, _eos, _punctuations, make_symbols, phonemes, symbols
-from TTS.tts.utils.chinese_mandarin.phonemizer import chinese_text_to_phonemes
-
 
 # pylint: disable=unnecessary-comprehension
 # Mappings from symbol to numeric ID and vice versa:
diff --git a/TTS/tts/utils/text/cleaners.py b/TTS/tts/utils/text/cleaners.py
index 555d01d1..d61738a6 100644
--- a/TTS/tts/utils/text/cleaners.py
+++ b/TTS/tts/utils/text/cleaners.py
@@ -11,12 +11,14 @@ hyperparameter. Some cleaners are English-specific. You'll typically want to use
 """
 
 import re
+
 from unidecode import unidecode
-from .number_norm import normalize_numbers
-from .abbreviations import abbreviations_en, abbreviations_fr
-from .time import expand_time_english
+
 from TTS.tts.utils.chinese_mandarin.numbers import replace_numbers_to_characters_in_text
 
+from .abbreviations import abbreviations_en, abbreviations_fr
+from .number_norm import normalize_numbers
+from .time import expand_time_english
 
 # Regular expression matching whitespace:
 _whitespace_re = re.compile(r"\s+")
diff --git a/TTS/tts/utils/text/number_norm.py b/TTS/tts/utils/text/number_norm.py
index 4f648b42..e8377ede 100644
--- a/TTS/tts/utils/text/number_norm.py
+++ b/TTS/tts/utils/text/number_norm.py
@@ -1,9 +1,10 @@
 """ from https://github.com/keithito/tacotron """
 
-import inflect
 import re
 from typing import Dict
 
+import inflect
+
 _inflect = inflect.engine()
 _comma_number_re = re.compile(r"([0-9][0-9\,]+[0-9])")
 _decimal_number_re = re.compile(r"([0-9]+\.[0-9]+)")
diff --git a/TTS/tts/utils/text/time.py b/TTS/tts/utils/text/time.py
index a591434f..c8ac09e7 100644
--- a/TTS/tts/utils/text/time.py
+++ b/TTS/tts/utils/text/time.py
@@ -1,4 +1,5 @@
 import re
+
 import inflect
 
 _inflect = inflect.engine()
diff --git a/TTS/tts/utils/visual.py b/TTS/tts/utils/visual.py
index 97a8cd48..44732322 100644
--- a/TTS/tts/utils/visual.py
+++ b/TTS/tts/utils/visual.py
@@ -1,12 +1,13 @@
 import librosa
 import matplotlib
+import matplotlib.pyplot as plt
 import numpy as np
 import torch
 
-matplotlib.use("Agg")
-import matplotlib.pyplot as plt
 from TTS.tts.utils.text import phoneme_to_sequence, sequence_to_phoneme
 
+matplotlib.use("Agg")
+
 
 def plot_alignment(alignment, info=None, fig_size=(16, 10), title=None, output_fig=False):
     if isinstance(alignment, torch.Tensor):
diff --git a/TTS/utils/arguments.py b/TTS/utils/arguments.py
index c688cd16..af0a1598 100644
--- a/TTS/utils/arguments.py
+++ b/TTS/utils/arguments.py
@@ -4,11 +4,12 @@
 
 import argparse
 import glob
+import json
 import os
 import re
-import json
 
 import torch
+
 from TTS.tts.utils.text.symbols import parse_symbols
 from TTS.utils.console_logger import ConsoleLogger
 from TTS.utils.generic_utils import create_experiment_folder, get_git_branch
diff --git a/TTS/utils/audio.py b/TTS/utils/audio.py
index 2c451d23..60af8f3e 100644
--- a/TTS/utils/audio.py
+++ b/TTS/utils/audio.py
@@ -1,12 +1,13 @@
 import librosa
-import soundfile as sf
 import numpy as np
 import scipy.io.wavfile
 import scipy.signal
+import soundfile as sf
+
+from TTS.tts.utils.data import StandardScaler
 
 # import pyworld as pw
 
-from TTS.tts.utils.data import StandardScaler
 
 # pylint: disable=too-many-public-methods
 class AudioProcessor(object):
diff --git a/TTS/utils/console_logger.py b/TTS/utils/console_logger.py
index a035fa4e..7d6e1968 100644
--- a/TTS/utils/console_logger.py
+++ b/TTS/utils/console_logger.py
@@ -1,6 +1,6 @@
 import datetime
-from TTS.utils.io import AttrDict
 
+from TTS.utils.io import AttrDict
 
 tcolors = AttrDict(
     {
diff --git a/TTS/utils/io.py b/TTS/utils/io.py
index 846c6fc1..84493e07 100644
--- a/TTS/utils/io.py
+++ b/TTS/utils/io.py
@@ -1,10 +1,11 @@
-import os
-import re
 import json
-import yaml
+import os
 import pickle as pickle_tts
+import re
 from shutil import copyfile
 
+import yaml
+
 
 class RenamingUnpickler(pickle_tts.Unpickler):
     """Overload default pickler to solve module renaming problem"""
diff --git a/TTS/utils/manage.py b/TTS/utils/manage.py
index ad2dd8b9..f0a81227 100644
--- a/TTS/utils/manage.py
+++ b/TTS/utils/manage.py
@@ -7,6 +7,7 @@ from shutil import copyfile
 
 import gdown
 import requests
+
 from TTS.utils.generic_utils import get_user_data_dir
 from TTS.utils.io import load_config
 
diff --git a/TTS/utils/radam.py b/TTS/utils/radam.py
index 37403929..b6c86fed 100644
--- a/TTS/utils/radam.py
+++ b/TTS/utils/radam.py
@@ -1,6 +1,7 @@
 # from https://github.com/LiyuanLucasLiu/RAdam
 
 import math
+
 import torch
 from torch.optim.optimizer import Optimizer
 
diff --git a/TTS/utils/synthesizer.py b/TTS/utils/synthesizer.py
index b8896ec4..fb15a16c 100644
--- a/TTS/utils/synthesizer.py
+++ b/TTS/utils/synthesizer.py
@@ -1,19 +1,18 @@
 import time
 
 import numpy as np
-import torch
 import pysbd
+import torch
 
-from TTS.utils.audio import AudioProcessor
-from TTS.utils.io import load_config
 from TTS.tts.utils.generic_utils import setup_model
 from TTS.tts.utils.speakers import load_speaker_mapping
-from TTS.vocoder.utils.generic_utils import setup_generator, interpolate_vocoder_input
-
 # pylint: disable=unused-wildcard-import
 # pylint: disable=wildcard-import
 from TTS.tts.utils.synthesis import synthesis, trim_silence
 from TTS.tts.utils.text import make_symbols, phonemes, symbols
+from TTS.utils.audio import AudioProcessor
+from TTS.utils.io import load_config
+from TTS.vocoder.utils.generic_utils import interpolate_vocoder_input, setup_generator
 
 
 class Synthesizer(object):
diff --git a/TTS/utils/tensorboard_logger.py b/TTS/utils/tensorboard_logger.py
index 769d47f5..3874a42b 100644
--- a/TTS/utils/tensorboard_logger.py
+++ b/TTS/utils/tensorboard_logger.py
@@ -1,4 +1,5 @@
 import traceback
+
 from tensorboardX import SummaryWriter
 
 
diff --git a/TTS/utils/training.py b/TTS/utils/training.py
index 56255100..37b32637 100644
--- a/TTS/utils/training.py
+++ b/TTS/utils/training.py
@@ -1,5 +1,5 @@
-import torch
 import numpy as np
+import torch
 
 
 def setup_torch_training_env(cudnn_enable, cudnn_benchmark):
diff --git a/TTS/vocoder/datasets/gan_dataset.py b/TTS/vocoder/datasets/gan_dataset.py
index 4010b628..e14d50ff 100644
--- a/TTS/vocoder/datasets/gan_dataset.py
+++ b/TTS/vocoder/datasets/gan_dataset.py
@@ -1,11 +1,12 @@
-import os
 import glob
-import torch
+import os
 import random
-import numpy as np
-from torch.utils.data import Dataset
 from multiprocessing import Manager
 
+import numpy as np
+import torch
+from torch.utils.data import Dataset
+
 
 class GANDataset(Dataset):
     """
diff --git a/TTS/vocoder/datasets/preprocess.py b/TTS/vocoder/datasets/preprocess.py
index 2aa1d116..d99ee147 100644
--- a/TTS/vocoder/datasets/preprocess.py
+++ b/TTS/vocoder/datasets/preprocess.py
@@ -1,9 +1,9 @@
 import glob
 import os
 from pathlib import Path
-from tqdm import tqdm
 
 import numpy as np
+from tqdm import tqdm
 
 
 def preprocess_wav_files(out_path, config, ap):
diff --git a/TTS/vocoder/datasets/wavegrad_dataset.py b/TTS/vocoder/datasets/wavegrad_dataset.py
index be2b5a8a..51767b56 100644
--- a/TTS/vocoder/datasets/wavegrad_dataset.py
+++ b/TTS/vocoder/datasets/wavegrad_dataset.py
@@ -1,11 +1,12 @@
-import os
 import glob
-import torch
+import os
 import random
-import numpy as np
-from torch.utils.data import Dataset
 from multiprocessing import Manager
 
+import numpy as np
+import torch
+from torch.utils.data import Dataset
+
 
 class WaveGradDataset(Dataset):
     """
diff --git a/TTS/vocoder/datasets/wavernn_dataset.py b/TTS/vocoder/datasets/wavernn_dataset.py
index 4a554580..1596ea8f 100644
--- a/TTS/vocoder/datasets/wavernn_dataset.py
+++ b/TTS/vocoder/datasets/wavernn_dataset.py
@@ -1,5 +1,5 @@
-import torch
 import numpy as np
+import torch
 from torch.utils.data import Dataset
 
 
diff --git a/TTS/vocoder/layers/losses.py b/TTS/vocoder/layers/losses.py
index f988565b..2e204115 100644
--- a/TTS/vocoder/layers/losses.py
+++ b/TTS/vocoder/layers/losses.py
@@ -1,5 +1,5 @@
-import torch
 import librosa
+import torch
 from torch import nn
 from torch.nn import functional as F
 
diff --git a/TTS/vocoder/layers/pqmf.py b/TTS/vocoder/layers/pqmf.py
index 5cfbf729..6253efbb 100644
--- a/TTS/vocoder/layers/pqmf.py
+++ b/TTS/vocoder/layers/pqmf.py
@@ -1,7 +1,6 @@
 import numpy as np
 import torch
 import torch.nn.functional as F
-
 from scipy import signal as sig
 
 
diff --git a/TTS/vocoder/models/multiband_melgan_generator.py b/TTS/vocoder/models/multiband_melgan_generator.py
index 0caadc09..25d65906 100644
--- a/TTS/vocoder/models/multiband_melgan_generator.py
+++ b/TTS/vocoder/models/multiband_melgan_generator.py
@@ -1,7 +1,7 @@
 import torch
 
-from TTS.vocoder.models.melgan_generator import MelganGenerator
 from TTS.vocoder.layers.pqmf import PQMF
+from TTS.vocoder.models.melgan_generator import MelganGenerator
 
 
 class MultibandMelganGenerator(MelganGenerator):
diff --git a/TTS/vocoder/models/parallel_wavegan_discriminator.py b/TTS/vocoder/models/parallel_wavegan_discriminator.py
index 7414c233..9cc1061c 100644
--- a/TTS/vocoder/models/parallel_wavegan_discriminator.py
+++ b/TTS/vocoder/models/parallel_wavegan_discriminator.py
@@ -1,4 +1,5 @@
 import math
+
 import torch
 from torch import nn
 
diff --git a/TTS/vocoder/models/parallel_wavegan_generator.py b/TTS/vocoder/models/parallel_wavegan_generator.py
index c9a84a0e..788856cc 100644
--- a/TTS/vocoder/models/parallel_wavegan_generator.py
+++ b/TTS/vocoder/models/parallel_wavegan_generator.py
@@ -1,4 +1,5 @@
 import math
+
 import numpy as np
 import torch
 
diff --git a/TTS/vocoder/models/wavegrad.py b/TTS/vocoder/models/wavegrad.py
index ef8e8add..d19c2a5e 100644
--- a/TTS/vocoder/models/wavegrad.py
+++ b/TTS/vocoder/models/wavegrad.py
@@ -3,7 +3,7 @@ import torch
 from torch import nn
 from torch.nn.utils import weight_norm
 
-from ..layers.wavegrad import DBlock, FiLM, UBlock, Conv1d
+from ..layers.wavegrad import Conv1d, DBlock, FiLM, UBlock
 
 
 class Wavegrad(nn.Module):
diff --git a/TTS/vocoder/models/wavernn.py b/TTS/vocoder/models/wavernn.py
index ca4ea3f8..994244dc 100644
--- a/TTS/vocoder/models/wavernn.py
+++ b/TTS/vocoder/models/wavernn.py
@@ -1,16 +1,14 @@
 import sys
+import time
+
+import numpy as np
 import torch
 import torch.nn as nn
-import numpy as np
 import torch.nn.functional as F
-import time
 
 # fix this
 from TTS.utils.audio import AudioProcessor as ap
-from TTS.vocoder.utils.distribution import (
-    sample_from_gaussian,
-    sample_from_discretized_mix_logistic,
-)
+from TTS.vocoder.utils.distribution import sample_from_discretized_mix_logistic, sample_from_gaussian
 
 
 def stream(string, variables):
diff --git a/TTS/vocoder/tf/layers/pqmf.py b/TTS/vocoder/tf/layers/pqmf.py
index e1b5055a..81b666b9 100644
--- a/TTS/vocoder/tf/layers/pqmf.py
+++ b/TTS/vocoder/tf/layers/pqmf.py
@@ -1,6 +1,5 @@
 import numpy as np
 import tensorflow as tf
-
 from scipy import signal as sig
 
 
diff --git a/TTS/vocoder/tf/models/melgan_generator.py b/TTS/vocoder/tf/models/melgan_generator.py
index 0a8a0b73..1a0fa103 100644
--- a/TTS/vocoder/tf/models/melgan_generator.py
+++ b/TTS/vocoder/tf/models/melgan_generator.py
@@ -1,11 +1,13 @@
 import logging
 import os
 
+import tensorflow as tf
+
+from TTS.vocoder.tf.layers.melgan import ReflectionPad1d, ResidualStack
+
 os.environ["TF_CPP_MIN_LOG_LEVEL"] = "3"  # FATAL
 logging.getLogger("tensorflow").setLevel(logging.FATAL)
 
-import tensorflow as tf
-from TTS.vocoder.tf.layers.melgan import ResidualStack, ReflectionPad1d
 
 
 # pylint: disable=too-many-ancestors
diff --git a/TTS/vocoder/tf/models/multiband_melgan_generator.py b/TTS/vocoder/tf/models/multiband_melgan_generator.py
index 23836659..24d899b2 100644
--- a/TTS/vocoder/tf/models/multiband_melgan_generator.py
+++ b/TTS/vocoder/tf/models/multiband_melgan_generator.py
@@ -1,7 +1,8 @@
 import tensorflow as tf
 
-from TTS.vocoder.tf.models.melgan_generator import MelganGenerator
 from TTS.vocoder.tf.layers.pqmf import PQMF
+from TTS.vocoder.tf.models.melgan_generator import MelganGenerator
+
 
 # pylint: disable=too-many-ancestors
 # pylint: disable=abstract-method
diff --git a/TTS/vocoder/tf/utils/generic_utils.py b/TTS/vocoder/tf/utils/generic_utils.py
index 97cb9ae7..94364ab4 100644
--- a/TTS/vocoder/tf/utils/generic_utils.py
+++ b/TTS/vocoder/tf/utils/generic_utils.py
@@ -1,5 +1,5 @@
-import re
 import importlib
+import re
 
 
 def to_camel(text):
diff --git a/TTS/vocoder/tf/utils/io.py b/TTS/vocoder/tf/utils/io.py
index 6ffa302c..4f69ad27 100644
--- a/TTS/vocoder/tf/utils/io.py
+++ b/TTS/vocoder/tf/utils/io.py
@@ -1,5 +1,6 @@
 import datetime
 import pickle
+
 import tensorflow as tf
 
 
diff --git a/TTS/vocoder/utils/distribution.py b/TTS/vocoder/utils/distribution.py
index 3f62b7ad..9b37aa12 100644
--- a/TTS/vocoder/utils/distribution.py
+++ b/TTS/vocoder/utils/distribution.py
@@ -1,8 +1,9 @@
-import numpy as np
 import math
+
+import numpy as np
 import torch
-from torch.distributions.normal import Normal
 import torch.nn.functional as F
+from torch.distributions.normal import Normal
 
 
 def gaussian_loss(y_hat, y, log_std_min=-7.0):
diff --git a/TTS/vocoder/utils/generic_utils.py b/TTS/vocoder/utils/generic_utils.py
index 35102295..53de9d96 100644
--- a/TTS/vocoder/utils/generic_utils.py
+++ b/TTS/vocoder/utils/generic_utils.py
@@ -1,7 +1,8 @@
-import re
-import torch
 import importlib
+import re
+
 import numpy as np
+import torch
 from matplotlib import pyplot as plt
 
 from TTS.tts.utils.visual import plot_spectrogram
diff --git a/TTS/vocoder/utils/io.py b/TTS/vocoder/utils/io.py
index 8a5d144d..9c67535f 100644
--- a/TTS/vocoder/utils/io.py
+++ b/TTS/vocoder/utils/io.py
@@ -1,9 +1,10 @@
-import os
-import glob
-import torch
 import datetime
+import glob
+import os
 import pickle as pickle_tts
 
+import torch
+
 from TTS.utils.io import RenamingUnpickler
 
 
diff --git a/hubconf.py b/hubconf.py
index d8589c94..0dd25893 100644
--- a/hubconf.py
+++ b/hubconf.py
@@ -1,8 +1,8 @@
 dependencies = ['torch', 'gdown', 'pysbd', 'phonemizer', 'unidecode', 'pypinyin']  # apt install espeak-ng
 import torch
 
-from TTS.utils.synthesizer import Synthesizer
 from TTS.utils.manage import ModelManager
+from TTS.utils.synthesizer import Synthesizer
 
 
 def tts(model_name='tts_models/en/ljspeech/tacotron2-DCA', vocoder_name=None, use_cuda=False):
diff --git a/notebooks/dataset_analysis/analyze.py b/notebooks/dataset_analysis/analyze.py
index 161e2ae3..66d008cd 100644
--- a/notebooks/dataset_analysis/analyze.py
+++ b/notebooks/dataset_analysis/analyze.py
@@ -1,14 +1,16 @@
 # visualisation tools for mimic2
-import matplotlib.pyplot as plt
-from statistics import stdev, mode, mean, median
-from statistics import StatisticsError
 import argparse
-import os
 import csv
-import seaborn as sns
+import os
 import random
+from statistics import StatisticsError, mean, median, mode, stdev
+
+import matplotlib.pyplot as plt
+
+import seaborn as sns
 from text.cmudict import CMUDict
 
+
 def get_audio_seconds(frames):
     return (frames*12.5)/1000
 
diff --git a/setup.py b/setup.py
index de277655..68337644 100644
--- a/setup.py
+++ b/setup.py
@@ -8,9 +8,8 @@ from distutils.version import LooseVersion
 import numpy
 import setuptools.command.build_py
 import setuptools.command.develop
-from setuptools import setup, Extension, find_packages
 from Cython.Build import cythonize
-
+from setuptools import Extension, find_packages, setup
 
 if LooseVersion(sys.version) < LooseVersion("3.6") or LooseVersion(sys.version) > LooseVersion("3.9"):
     raise RuntimeError(
diff --git a/tests/test_audio.py b/tests/test_audio.py
index e33a6d6c..75141730 100644
--- a/tests/test_audio.py
+++ b/tests/test_audio.py
@@ -2,7 +2,6 @@ import os
 import unittest
 
 from tests import get_tests_input_path, get_tests_output_path, get_tests_path
-
 from TTS.utils.audio import AudioProcessor
 from TTS.utils.io import load_config
 
diff --git a/tests/test_feed_forward_layers.py b/tests/test_feed_forward_layers.py
index 7dd54e56..a19e808c 100644
--- a/tests/test_feed_forward_layers.py
+++ b/tests/test_feed_forward_layers.py
@@ -1,4 +1,5 @@
 import torch
+
 from TTS.tts.layers.feed_forward.decoder import Decoder
 from TTS.tts.layers.feed_forward.encoder import Encoder
 from TTS.tts.utils.generic_utils import sequence_mask
diff --git a/tests/test_glow_tts.py b/tests/test_glow_tts.py
index e9fdc761..66d594e2 100644
--- a/tests/test_glow_tts.py
+++ b/tests/test_glow_tts.py
@@ -3,13 +3,13 @@ import os
 import unittest
 
 import torch
-from tests import get_tests_input_path
 from torch import optim
 
+from tests import get_tests_input_path
 from TTS.tts.layers.losses import GlowTTSLoss
 from TTS.tts.models.glow_tts import GlowTTS
-from TTS.utils.io import load_config
 from TTS.utils.audio import AudioProcessor
+from TTS.utils.io import load_config
 
 #pylint: disable=unused-variable
 
diff --git a/tests/test_layers.py b/tests/test_layers.py
index 582ca8be..9224c673 100644
--- a/tests/test_layers.py
+++ b/tests/test_layers.py
@@ -1,8 +1,9 @@
 import unittest
+
 import torch as T
 
-from TTS.tts.layers.tacotron.tacotron import Prenet, CBHG, Decoder, Encoder
 from TTS.tts.layers.losses import L1LossMasked, SSIMLoss
+from TTS.tts.layers.tacotron.tacotron import CBHG, Decoder, Encoder, Prenet
 from TTS.tts.utils.generic_utils import sequence_mask
 
 # pylint: disable=unused-variable
diff --git a/tests/test_loader.py b/tests/test_loader.py
index 439e8d35..e711cc03 100644
--- a/tests/test_loader.py
+++ b/tests/test_loader.py
@@ -4,9 +4,9 @@ import unittest
 
 import numpy as np
 import torch
-from tests import get_tests_input_path, get_tests_output_path
 from torch.utils.data import DataLoader
 
+from tests import get_tests_input_path, get_tests_output_path
 from TTS.tts.datasets import TTSDataset
 from TTS.tts.datasets.preprocess import ljspeech
 from TTS.utils.audio import AudioProcessor
diff --git a/tests/test_preprocessors.py b/tests/test_preprocessors.py
index 8c7b16b0..c120018d 100644
--- a/tests/test_preprocessors.py
+++ b/tests/test_preprocessors.py
@@ -1,7 +1,7 @@
-import unittest
 import os
-from tests import get_tests_input_path
+import unittest
 
+from tests import get_tests_input_path
 from TTS.tts.datasets.preprocess import common_voice
 
 
diff --git a/tests/test_speaker_encoder.py b/tests/test_speaker_encoder.py
index 4d4dbba1..77f3b54c 100644
--- a/tests/test_speaker_encoder.py
+++ b/tests/test_speaker_encoder.py
@@ -2,9 +2,9 @@ import os
 import unittest
 
 import torch as T
-from tests import get_tests_input_path
 
-from TTS.speaker_encoder.losses import GE2ELoss, AngleProtoLoss
+from tests import get_tests_input_path
+from TTS.speaker_encoder.losses import AngleProtoLoss, GE2ELoss
 from TTS.speaker_encoder.model import SpeakerEncoder
 from TTS.utils.io import load_config
 
diff --git a/tests/test_speedy_speech_layers.py b/tests/test_speedy_speech_layers.py
index 954d5eca..51a2450a 100644
--- a/tests/test_speedy_speech_layers.py
+++ b/tests/test_speedy_speech_layers.py
@@ -1,8 +1,8 @@
 import torch
-from TTS.tts.layers.feed_forward.duration_predictor import DurationPredictor
-from TTS.tts.utils.generic_utils import sequence_mask
-from TTS.tts.models.speedy_speech import SpeedySpeech
 
+from TTS.tts.layers.feed_forward.duration_predictor import DurationPredictor
+from TTS.tts.models.speedy_speech import SpeedySpeech
+from TTS.tts.utils.generic_utils import sequence_mask
 
 use_cuda = torch.cuda.is_available()
 device = torch.device("cuda:0" if torch.cuda.is_available() else "cpu")
diff --git a/tests/test_symbols.py b/tests/test_symbols.py
index 4e70b9d5..0c24f124 100644
--- a/tests/test_symbols.py
+++ b/tests/test_symbols.py
@@ -2,6 +2,7 @@ import unittest
 
 from TTS.tts.utils.text import phonemes
 
+
 class SymbolsTest(unittest.TestCase):
     def test_uniqueness(self):  #pylint: disable=no-self-use
         assert sorted(phonemes) == sorted(list(set(phonemes))), " {} vs {} ".format(len(phonemes), len(set(phonemes)))
diff --git a/tests/test_synthesizer.py b/tests/test_synthesizer.py
index b7d3febc..1c2c23b2 100644
--- a/tests/test_synthesizer.py
+++ b/tests/test_synthesizer.py
@@ -2,11 +2,11 @@ import os
 import unittest
 
 from tests import get_tests_input_path, get_tests_output_path
-from TTS.utils.synthesizer import Synthesizer
 from TTS.tts.utils.generic_utils import setup_model
 from TTS.tts.utils.io import save_checkpoint
 from TTS.tts.utils.text.symbols import make_symbols, phonemes, symbols
 from TTS.utils.io import load_config
+from TTS.utils.synthesizer import Synthesizer
 
 
 class SynthesizerTest(unittest.TestCase):
diff --git a/tests/test_tacotron2_model.py b/tests/test_tacotron2_model.py
index 4ac07118..fb811eaa 100644
--- a/tests/test_tacotron2_model.py
+++ b/tests/test_tacotron2_model.py
@@ -3,13 +3,13 @@ import os
 import unittest
 
 import torch
-from tests import get_tests_input_path
 from torch import nn, optim
 
+from tests import get_tests_input_path
 from TTS.tts.layers.losses import MSELossMasked
 from TTS.tts.models.tacotron2 import Tacotron2
-from TTS.utils.io import load_config
 from TTS.utils.audio import AudioProcessor
+from TTS.utils.io import load_config
 
 #pylint: disable=unused-variable
 
diff --git a/tests/test_tacotron2_tf_model.py b/tests/test_tacotron2_tf_model.py
index b792cfa7..084b972d 100644
--- a/tests/test_tacotron2_tf_model.py
+++ b/tests/test_tacotron2_tf_model.py
@@ -4,10 +4,10 @@ import unittest
 import numpy as np
 import tensorflow as tf
 import torch
+
 from tests import get_tests_input_path
 from TTS.tts.tf.models.tacotron2 import Tacotron2
-from TTS.tts.tf.utils.tflite import (convert_tacotron2_to_tflite,
-                                     load_tflite_model)
+from TTS.tts.tf.utils.tflite import convert_tacotron2_to_tflite, load_tflite_model
 from TTS.utils.io import load_config
 
 tf.get_logger().setLevel('INFO')
diff --git a/tests/test_tacotron_model.py b/tests/test_tacotron_model.py
index f8e88160..0af8dab4 100644
--- a/tests/test_tacotron_model.py
+++ b/tests/test_tacotron_model.py
@@ -3,13 +3,13 @@ import os
 import unittest
 
 import torch
-from tests import get_tests_input_path
 from torch import nn, optim
 
+from tests import get_tests_input_path
 from TTS.tts.layers.losses import L1LossMasked
 from TTS.tts.models.tacotron import Tacotron
-from TTS.utils.io import load_config
 from TTS.utils.audio import AudioProcessor
+from TTS.utils.io import load_config
 
 #pylint: disable=unused-variable
 
diff --git a/tests/test_text_processing.py b/tests/test_text_processing.py
index 774ac0aa..b8b74e28 100644
--- a/tests/test_text_processing.py
+++ b/tests/test_text_processing.py
@@ -1,10 +1,10 @@
 import os
+
 # pylint: disable=unused-wildcard-import
 # pylint: disable=wildcard-import
 # pylint: disable=unused-import
-from tests import get_tests_input_path
+from tests import get_tests_input_path, get_tests_path
 from TTS.tts.utils.text import *
-from tests import get_tests_path
 from TTS.utils.io import load_config
 
 conf = load_config(os.path.join(get_tests_input_path(), 'test_config.json'))
diff --git a/tests/test_vocoder_gan_datasets.py b/tests/test_vocoder_gan_datasets.py
index 99a25dcf..13b1b9d2 100644
--- a/tests/test_vocoder_gan_datasets.py
+++ b/tests/test_vocoder_gan_datasets.py
@@ -1,9 +1,9 @@
 import os
 
 import numpy as np
-from tests import get_tests_path, get_tests_input_path, get_tests_output_path
 from torch.utils.data import DataLoader
 
+from tests import get_tests_input_path, get_tests_output_path, get_tests_path
 from TTS.utils.audio import AudioProcessor
 from TTS.utils.io import load_config
 from TTS.vocoder.datasets.gan_dataset import GANDataset
diff --git a/tests/test_vocoder_losses.py b/tests/test_vocoder_losses.py
index 4a18ee53..7b3c7017 100644
--- a/tests/test_vocoder_losses.py
+++ b/tests/test_vocoder_losses.py
@@ -1,11 +1,11 @@
 import os
 
 import torch
-from tests import get_tests_input_path, get_tests_output_path, get_tests_path
 
+from tests import get_tests_input_path, get_tests_output_path, get_tests_path
 from TTS.utils.audio import AudioProcessor
 from TTS.utils.io import load_config
-from TTS.vocoder.layers.losses import MultiScaleSTFTLoss, STFTLoss, TorchSTFT, MelganFeatureLoss
+from TTS.vocoder.layers.losses import MelganFeatureLoss, MultiScaleSTFTLoss, STFTLoss, TorchSTFT
 
 TESTS_PATH = get_tests_path()
 
diff --git a/tests/test_vocoder_melgan_generator.py b/tests/test_vocoder_melgan_generator.py
index fedf6301..f4958de4 100644
--- a/tests/test_vocoder_melgan_generator.py
+++ b/tests/test_vocoder_melgan_generator.py
@@ -3,6 +3,7 @@ import torch
 
 from TTS.vocoder.models.melgan_generator import MelganGenerator
 
+
 def test_melgan_generator():
     model = MelganGenerator()
     print(model)
diff --git a/tests/test_vocoder_parallel_wavegan_discriminator.py b/tests/test_vocoder_parallel_wavegan_discriminator.py
index b496e216..6496d562 100644
--- a/tests/test_vocoder_parallel_wavegan_discriminator.py
+++ b/tests/test_vocoder_parallel_wavegan_discriminator.py
@@ -1,7 +1,8 @@
 import numpy as np
 import torch
 
-from TTS.vocoder.models.parallel_wavegan_discriminator import ParallelWaveganDiscriminator, ResidualParallelWaveganDiscriminator
+from TTS.vocoder.models.parallel_wavegan_discriminator import (ParallelWaveganDiscriminator,
+                                                               ResidualParallelWaveganDiscriminator)
 
 
 def test_pwgan_disciminator():
diff --git a/tests/test_vocoder_pqmf.py b/tests/test_vocoder_pqmf.py
index 74da451f..3112df5a 100644
--- a/tests/test_vocoder_pqmf.py
+++ b/tests/test_vocoder_pqmf.py
@@ -1,13 +1,12 @@
 import os
-import torch
 
 import soundfile as sf
+import torch
 from librosa.core import load
 
-from tests import get_tests_path, get_tests_input_path, get_tests_output_path
+from tests import get_tests_input_path, get_tests_output_path, get_tests_path
 from TTS.vocoder.layers.pqmf import PQMF
 
-
 TESTS_PATH = get_tests_path()
 WAV_FILE = os.path.join(get_tests_input_path(), "example_1.wav")
 
diff --git a/tests/test_vocoder_rwd.py b/tests/test_vocoder_rwd.py
index 424d3b49..82525e1b 100644
--- a/tests/test_vocoder_rwd.py
+++ b/tests/test_vocoder_rwd.py
@@ -1,5 +1,5 @@
-import torch
 import numpy as np
+import torch
 
 from TTS.vocoder.models.random_window_discriminator import RandomWindowDiscriminator
 
diff --git a/tests/test_vocoder_tf_pqmf.py b/tests/test_vocoder_tf_pqmf.py
index 16c46b2a..28aebe5b 100644
--- a/tests/test_vocoder_tf_pqmf.py
+++ b/tests/test_vocoder_tf_pqmf.py
@@ -1,13 +1,12 @@
 import os
-import tensorflow as tf
 
 import soundfile as sf
+import tensorflow as tf
 from librosa.core import load
 
-from tests import get_tests_path, get_tests_input_path, get_tests_output_path
+from tests import get_tests_input_path, get_tests_output_path, get_tests_path
 from TTS.vocoder.tf.layers.pqmf import PQMF
 
-
 TESTS_PATH = get_tests_path()
 WAV_FILE = os.path.join(get_tests_input_path(), "example_1.wav")
 
diff --git a/tests/test_vocoder_wavernn.py b/tests/test_vocoder_wavernn.py
index 2464cfa3..9c58fa1c 100644
--- a/tests/test_vocoder_wavernn.py
+++ b/tests/test_vocoder_wavernn.py
@@ -1,6 +1,8 @@
+import random
+
 import numpy as np
 import torch
-import random
+
 from TTS.vocoder.models.wavernn import WaveRNN
 
 
diff --git a/tests/test_vocoder_wavernn_datasets.py b/tests/test_vocoder_wavernn_datasets.py
index a95e247a..6a2a3339 100644
--- a/tests/test_vocoder_wavernn_datasets.py
+++ b/tests/test_vocoder_wavernn_datasets.py
@@ -2,13 +2,13 @@ import os
 import shutil
 
 import numpy as np
-from tests import get_tests_path, get_tests_input_path, get_tests_output_path
 from torch.utils.data import DataLoader
 
+from tests import get_tests_input_path, get_tests_output_path, get_tests_path
 from TTS.utils.audio import AudioProcessor
 from TTS.utils.io import load_config
-from TTS.vocoder.datasets.wavernn_dataset import WaveRNNDataset
 from TTS.vocoder.datasets.preprocess import load_wav_feat_data, preprocess_wav_files
+from TTS.vocoder.datasets.wavernn_dataset import WaveRNNDataset
 
 file_path = os.path.dirname(os.path.realpath(__file__))
 OUTPATH = os.path.join(get_tests_output_path(), "loader_tests/")
diff --git a/tests/test_wavegrad_layers.py b/tests/test_wavegrad_layers.py
index d81ae47d..6052e922 100644
--- a/tests/test_wavegrad_layers.py
+++ b/tests/test_wavegrad_layers.py
@@ -1,6 +1,6 @@
 import torch
 
-from TTS.vocoder.layers.wavegrad import PositionalEncoding, FiLM, UBlock, DBlock
+from TTS.vocoder.layers.wavegrad import DBlock, FiLM, PositionalEncoding, UBlock
 from TTS.vocoder.models.wavegrad import Wavegrad
 
 
diff --git a/tests/test_wavegrad_train.py b/tests/test_wavegrad_train.py
index 45f75e3b..6c950c5a 100644
--- a/tests/test_wavegrad_train.py
+++ b/tests/test_wavegrad_train.py
@@ -3,6 +3,7 @@ import unittest
 import numpy as np
 import torch
 from torch import optim
+
 from TTS.vocoder.models.wavegrad import Wavegrad
 
 #pylint: disable=unused-variable