PyGTK Curve memory error

i need to draw a graph. and i use gtk.Curve widget for this. and when i add him a long vector it gives me this error:

GLib-ERROR **: /build/buildd/glib2.0-2.26.1/glib/gmem.c:170: failed to allocate 4294967276 bytes aborting...

the code is simple:

w = gtk.Window()
c = gtk.Curve()
c.set_vector(v)
c.set_curve_type(gtk.CURVE_TYPE_SPLINE)
w.add(c)
w.sho开发者_StackOverflow中文版w_all()
gtk.main()

the vector is a long list:

[0.80000000000000004, 0.29999999999999999, 0.29999999999999999, 0.80000000000000004, 0.90000000000000002, 0.20000000000000001, ...]

about 800 elements in this list. can anyone know whats the problem? thx

I do not know why but gtk.Curve does not seem to be able to manipulate data outside of the main loop. Try something like this to add the data after the main call.

import random, gtk, gobject

def createCurve(c):
    v = [random.random() for i in range(800)]
    c.set_vector(v)
    c.set_curve_type(gtk.CURVE_TYPE_SPLINE)
    return True

c = gtk.Curve()
vb = gtk.VBox()
vb.pack_start(c, True, True)
w = gtk.Window()
w.add(vb)
w.show_all()
gobject.timeout_add(2000, createCurve, c)
gtk.main()