import array
import cairo
import weakref
import gc

stipple_data = array.array('B', [0, 0, 0, 255,   0, 0, 0, 0,
                                 0, 0, 0, 0,   0, 0, 0, 255])
data_ref = weakref.ref(stipple_data)
surface = cairo.ImageSurface.create_for_data (stipple_data,
                                              cairo.FORMAT_ARGB32,
                                              2, 2, 8)
pattern = cairo.SurfacePattern(surface)

print "ref before: ", data_ref

print "delete stipple_data..."
del stipple_data
while gc.collect():
    pass
print "ref after delete stipple_data", data_ref

print "delete surface..."
del surface
while gc.collect():
    pass
print "ref after delete surface", data_ref