Remove unused imports

Signed-off-by: Ante Jukić <ajukic@nvidia.com>

tests/collections/asr/test_preprocessing_segment.py

@@ -42,7 +42,7 @@ def test_single_channel_input(self, channel_selector: Type[Union[str, int, List[
             # Expect a failure if looking for a different channel when input is 1D
             with pytest.raises(ValueError):
                 # UUT
-                signal_out = select_channels(signal_in, channel_selector)
+                select_channels(signal_in, channel_selector)
         else:
             # UUT
             signal_out = select_channels(signal_in, channel_selector)
@@ -58,7 +58,6 @@ def test_multi_channel_input(self, num_channels: int, channel_selector: Type[Uni
         """Cover the case with multi-channel input signal and single-
         or multi-channel output.
         """
-        num_samples = 1000
         signal_in = np.random.rand(self.num_samples, num_channels)
 
         # calculate golden output
@@ -85,13 +84,12 @@ def test_select_more_channels_than_available(
         """This test is expecting the UUT to fail because we ask for more channels
         than available in the input signal.
         """
-        num_samples = 1000
         signal_in = np.random.rand(self.num_samples, num_channels)
 
         # expect failure since we ask for more channels than available
         with pytest.raises(ValueError):
             # UUT
-            signal_out = select_channels(signal_in, channel_selector)
+            select_channels(signal_in, channel_selector)
 
 
 class TestAudioSegment:
@@ -445,7 +443,6 @@ def test_audio_segment_trim_match(self, tmpdir, target_sr):
         signal_len_sec = 2
         num_samples = signal_len_sec * sample_rate
         num_examples = 10
-        rtol, atol = 1e-5, 1e-6
 
         TrimSetup = namedtuple("TrimSetup", "ref top_db frame_length hop_length")
         trim_setups = []

tests/collections/audio/test_audio_datasets.py

@@ -11,20 +11,14 @@
 # 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 copy
-import filecmp
-import json
 import os
-import shutil
 import tempfile
-from unittest import mock
 
 import numpy as np
 import pytest
 import soundfile as sf
 import torch.cuda
-from omegaconf import DictConfig, OmegaConf
-from torch.utils.data import DataLoader
+from omegaconf import OmegaConf
 
 from nemo.collections.asr.parts.utils.manifest_utils import write_manifest
 from nemo.collections.audio.data import audio_to_audio_dataset
@@ -41,7 +35,6 @@
 )
 from nemo.collections.audio.parts.utils.audio import get_segment_start
 from nemo.collections.common.data.lhotse import get_lhotse_dataloader_from_config
-from nemo.utils import logging
 
 
 class TestAudioDatasets:

tests/collections/audio/utils/test_audio_utils.py

@@ -13,14 +13,12 @@
 # limitations under the License.
 
 import os
-from typing import List, Type, Union
 
 import librosa
 import matplotlib.pyplot as plt
 import numpy as np
 import pytest
 import scipy
-import soundfile as sf
 import torch
 
 from nemo.collections.audio.parts.utils.audio import SOUND_VELOCITY as sound_velocity