code: def equatorial_zone_vertices(vertices, pole, width=5):
      """
      finds the 'vertices' in the equatorial zone conjugate
      to 'pole' with width half 'width' degrees
      """
      return [
          i
          for i, v in enumerate(vertices)
          if np.abs(np.dot(v, pole))
          < np.abs(np.sin(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 4 for calling a global function with example usage: equatorial_zone_vertices(vertices, pole, width) and returns: unknown