from gi.repository import Gtk

def gen_store():
    st = Gtk.ListStore(*[str for f in range(5)])
    for r in xrange(100000):
        st.append(['Aaaaaaa', 'Bbbbbbb', 'Ccccccc', 'Ddddddd', 'Eeeeeee'])
    return st

if __name__ == '__main__':
    for i in range(10):
        raw_input('Press <Enter> ...')
        store = gen_store()
        del(store)