docstr: get the graphics window open and setup
docstr_tok: ["get","the","graphics","window","open","and","setup"]
code: def start(self):
      """
      get the graphics window open and setup
      """
      if (sys.flags.interactive != 1) or not hasattr(
          QtCore, "PYQT_VERSION"
      ):
          QtGui.QApplication.instance().exec_()
  
file_path: audio-spectrum-analyzer/terrain_audio.py
imports: import numpy
  from opensimplex import OpenSimplex
  import pyqtgraph.opengl
  from pyqtgraph.Qt import QtCore, QtGui
  import struct
  import pyaudio
  import sys
label_desc: Use image node_id 4 for calling the Terrain obj's underlying member method code with example usage: obj.start() without return types