new_contents: #!/usr/env python
  
  import matplotlib.pyplot as plt
  import astropy.io.fits as fits
  
  if __name__ == "__main__":
      '''
      shows the plot 2 given coluns of a fits file
      '''
  
      inptname = str(raw_input("Nome do Arquivo: "))
      field1 = str(raw_input("Nome da coluna X: "))
      field2 = str(raw_input("Nome da coluna Y: "))
  
      tb = fits.open(inptname)
      x = tb[1].data.field(field1)
      y = tb[1].data.field(field2)
      tb.close()
  
      plt.plot(x,y)
      plt.show()
  
subject: add plotcolumns.py: plot columns (like xmm's dsplot)