code: def view(input_file, plane, backend):
      '''A simple neuron viewer'''
      if backend == 'matplotlib':
          from neurom.viewer import draw
          kwargs = {
              'mode': '3d' if plane == '3d' else '2d',
          }
          if plane != '3d':
              kwargs['plane'] = plane
          draw(load_neuron(input_file), **kwargs)
      else:
          from neurom.view.plotly import draw
          draw(load_neuron(input_file), plane=plane)
  
      if backend == 'matplotlib':
          import matplotlib.pyplot as plt
          plt.show(f view(input_file, plane, backend):
      '''A simple neuron viewer'''
      if backend == 'matplotlib':
          from neurom.viewer import draw
          kwargs = {
              'mode': '3d' if plane == '3d' else '2d',
          }
          if plane != '3d':
              kwargs['plane'] = plane
          draw(load_neuron(input_file), **kwargs)
      else:
          from neurom.view.plotly import draw
          draw(load_neuron(input_file), plane=plane)
  
      if backend == 'matplotlib':
          import matplotlib.pyplot as plt
          plt.show()
docs: A simple neuron viewer