[Pygui] to get specified lines of text

[Bqsj Sjbq]

here is my code:

from gi.repository import Gtk
class LabelWindow(Gtk.Window):
    def __init__(self):
        Gtk.Window.__init__(self, title="Label Example")
        hbox = Gtk.Box(spacing=0)
        label = Gtk.Label("This is an example of a line-wrapped label.  It "
                          "should not be taking up the entire             "
                          "width allocated to it, but automatically "
                          "wraps the words to fit.\n"
                          "     It supports multiple paragraphs correctly, "
                          "and  correctly   adds "
                          "many          extra  spaces. ")
        label.set_line_wrap(True)
        hbox.pack_start(label, True, True, 0)
        self.add(hbox)
window = LabelWindow()        
window.connect("delete-event", Gtk.main_quit)
window.show_all()
Gtk.main()

i get the gui (attachment  line1.png),what i want to get is that gui (attachment line2.png).how can i do?
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