def excision(args):
    """
    %prog excision

    Illustrate the mechanism of illegitimate recombination.
    """
    p = OptionParser(__doc__)
    opts, args = p.parse_args(args)

    fig = plt.figure(1, (5, 5))
    root = fig.add_axes([0, 0, 1, 1])

    plt.plot((.2, .8), (.6, .6), 'r-', lw=3)
    plt.plot((.4, .6), (.6, .6), 'b>-', mfc='g', mec='w', ms=12, lw=3)
    plt.plot((.3, .7), (.5, .5), 'r-', lw=3)
    plt.plot((.5, ), (.5, ), 'b>-', mfc='g', mec='w', ms=12, lw=3)

    # Circle excision
    plt.plot((.5, ), (.45, ), 'b>-', mfc='g', mec='w', ms=12, lw=3)
    circle = CirclePolygon((.5, .4), .05, fill=False, lw=3, ec="b")
    root.add_patch(circle)

    arrow_dist = .07
    ar_xpos, ar_ypos = .5, .52
    root.annotate(" ", (ar_xpos, ar_ypos),
            (ar_xpos, ar_ypos + arrow_dist),
            arrowprops=arrowprops)

    RoundLabel(root, .2, .64, "Gene")
    RoundLabel(root, .3, .54, "Excision")

    root.set_xlim(0, 1)
    root.set_ylim(0, 1)
    root.set_axis_off()

    figname = fname() + ".pdf"
    savefig(figname, dpi=300)
def excision ( args ) : p = OptionParser ( __doc__ ) opts , args = p . parse_args ( args ) fig = plt . figure ( 1 , ( 5 , 5 ) ) root = fig . add_axes ( [ 0 , 0 , 1 , 1 ] ) plt . plot ( ( .2 , .8 ) , ( .6 , .6 ) , 'r-' , lw = 3 ) plt . plot ( ( .4 , .6 ) , ( .6 , .6 ) , 'b>-' , mfc = 'g' , mec = 'w' , ms = 12 , lw = 3 ) plt . plot ( ( .3 , .7 ) , ( .5 , .5 ) , 'r-' , lw = 3 ) plt . plot ( ( .5 , ) , ( .5 , ) , 'b>-' , mfc = 'g' , mec = 'w' , ms = 12 , lw = 3 ) plt . plot ( ( .5 , ) , ( .45 , ) , 'b>-' , mfc = 'g' , mec = 'w' , ms = 12 , lw = 3 ) circle = CirclePolygon ( ( .5 , .4 ) , .05 , fill = False , lw = 3 , ec = "b" ) root . add_patch ( circle ) arrow_dist = .07 ar_xpos , ar_ypos = .5 , .52 root . annotate ( " " , ( ar_xpos , ar_ypos ) , ( ar_xpos , ar_ypos + arrow_dist ) , arrowprops = arrowprops ) RoundLabel ( root , .2 , .64 , "Gene" ) RoundLabel ( root , .3 , .54 , "Excision" ) root . set_xlim ( 0 , 1 ) root . set_ylim ( 0 , 1 ) root . set_axis_off ( ) figname = fname ( ) + ".pdf" savefig ( figname , dpi = 300 )
%prog excision

    Illustrate the mechanism of illegitimate recombination.