prevent double call of _cleanup, which harms usefiles (and is a bad idea in general)

[PyX.git] / manual / graph2.py

from pyx import *
g = graph.graphxy(width=8)
g.plot(graph.data.file("graph.dat", x=1, y=2))
g.plot(graph.data.function("y(x)=x**2"))
g.writePDFfile()