code: def fileChromagramWrapper(wav_file):
      if not os.path.isfile(wav_file):
          raise Exception("Input audio file not found!")
      [fs, x] = audioBasicIO.read_audio_file(wav_file)
      x = audioBasicIO.stereo_to_mono(x)
      specgram, TimeAxis, FreqAxis = sF.chromagram(
          x, fs, round(fs * 0.040), round(fs * 0.040), True
      )
  
imports: from __future__ import print_function
  import argparse
  import os
  import numpy
  import glob
  import matplotlib.pyplot
  import ShortTermFeatures
  import MidTermFeatures
  import audioTrainTest
  import audioSegmentation
  import audioVisualization
  import audioBasicIO
  import scipy.io.wavfile
  import matplotlib.patches
label_desc: Use image node_id 8 for calling a global function with example usage: fileChromagramWrapper(wav_file) without return types