from matplotlib import pyplot as pl
from matplotlib.widgets import MultiCursor
from matplotlib import gridspec
import numpy as np

if __name__ == "__main__":

  fig = pl.gcf()
  gs = gridspec.GridSpec(2,2)

  ax = None
  for g in gs:
    ax = pl.subplot(g, sharex=ax)

  multi = MultiCursor(fig.canvas, tuple(fig.axes),
                      useblit=True, horizOn=True, color='k', lw=1)

  x = np.arange(50,55,0.01)
  y1 = np.sin(x) 
  y2 = np.cos(x) + 4 
  y3 = 0.2*np.cos(x) - 4 
  y4 = np.cos(2*x) - 1 

  for ax,y in zip(fig.axes, [y1,y2,y3,y4]):
    ax.plot(x,y)

  for ax in fig.axes:
    ax.grid()

  #multi = MultiCursor(fig.canvas, tuple(fig.axes),
  #                    useblit=True, horizOn=True, color='k', lw=1)

  import matplotlib
  print(matplotlib.__version__)

  pl.draw()
  pl.show()