Fix lint errors to enable stricter PyLint rules

webrtc/modules/audio_processing/test/py_quality_assessment/quality_assessment/simulation.py

 # Copyright (c) 2017 The WebRTC project authors. All Rights Reserved.
 #
 # Use of this source code is governed by a BSD-style license
 # that can be found in the LICENSE file in the root of the source
 # tree. An additional intellectual property rights grant can be found
 # in the file PATENTS.  All contributing project authors may
 # be found in the AUTHORS file in the root of the source tree.
 
 """APM module simulator.
 """
@@ skipping 127 matching lines @@
       output_path: base output path for the test data generator.
       config_filepath: APM configuration file to test.
     """
     # Generate pairs of noisy input and reference signal files.
     test_data_generators.Generate(
         input_signal_filepath=input_filepath,
         input_noise_cache_path=input_noise_cache_path,
         base_output_path=output_path)
 
     # For each test data pair, simulate a call and evaluate.
-    for test_data_generators_config_name in test_data_generators.config_names:
-      logging.info(' - test data generator config: <%s>',
-                   test_data_generators_config_name)
+    for config_name in test_data_generators.config_names:
+      logging.info(' - test data generator config: <%s>', config_name)
 
       # APM input and output signal paths.
       noisy_signal_filepath = test_data_generators.noisy_signal_filepaths[
-          test_data_generators_config_name]
+          config_name]
       evaluation_output_path = test_data_generators.apm_output_paths[
-          test_data_generators_config_name]
+          config_name]
 
       # Simulate a call using the audio processing module.
       self._audioproc_wrapper.Run(
           config_filepath=config_filepath,
           input_filepath=noisy_signal_filepath,
           output_path=evaluation_output_path)
 
       # Reference signal path for the evaluation step.
       reference_signal_filepath = (
           test_data_generators.reference_signal_filepaths[
-              test_data_generators_config_name])
+              config_name])
 
       # Evaluate.
       self._evaluator.Run(
           evaluation_score_workers=self._evaluation_score_workers,
           apm_output_filepath=self._audioproc_wrapper.output_filepath,
           reference_input_filepath=reference_signal_filepath,
           output_path=evaluation_output_path)
 
   @classmethod
   def _CreatePathsCollection(cls, filepaths):
     """Creates a collection of file paths.
 
     Given a list of file paths, makes a collection with one item for each file
     path. The value is absolute path, the key is the file name without
     extenstion.
 
     Args:
       filepaths: list of file paths.
 
     Returns:
       A dict.
     """
     filepaths_collection = {}
     for filepath in filepaths:
       name = os.path.splitext(os.path.split(filepath)[1])[0]
       filepaths_collection[name] = os.path.abspath(filepath)
     return filepaths_collection