code: def polar_zone_vertices(vertices, pole, width=5):
      """
      finds the 'vertices' in the equatorial band around
      the 'pole' of radius 'width' degrees
      """
      return [
          i
          for i, v in enumerate(vertices)
          if np.abs(np.dot(v, pole))
          > np.abs(np.cos(np.pi * width / 180))
      ]
  
imports: import numpy
  from dipy.reconst.odf import OdfModel, OdfFit
  from dipy.reconst.cache import Cache
  import warnings
  from dipy.reconst.multi_voxel import multi_voxel_fit
label_desc: Use image node_id 5 for calling a global function with example usage: polar_zone_vertices(vertices, pole, width) and returns: unknown