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# matplotlib.lines.VertexSelector

class `matplotlib.lines.``VertexSelector`(line)

  Manage the callbacks to maintain a list of selected vertices for `matplotlib.lines.Line2D`. Derived classes should override `process_selected()` to do something with the picks.

  Here is an example which highlights the selected verts with red circles:

      import numpy as np
      import matplotlib.pyplot as plt
      import matplotlib.lines as lines

      class HighlightSelected(lines.VertexSelector):
          def __init__(self, line, fmt='ro', **kwargs):
              lines.VertexSelector.__init__(self, line)
              self.markers, = self.axes.plot([], [], fmt, **kwargs)

          def process_selected(self, ind, xs, ys):
              self.markers.set_data(xs, ys)
              self.canvas.draw()

      fig = plt.figure()
      ax = fig.add_subplot(111)
      x, y = np.random.rand(2, 30)
      line, = ax.plot(x, y, 'bs-', picker=5)

      selector = HighlightSelected(line)
      plt.show()

  Initialize the class with a `matplotlib.lines.Line2D` instance. The line should already be added to some `matplotlib.axes.Axes` instance and should have the picker property set.