[root@localhost ~]# virt-manager 
> /usr/share/virt-manager/virt-manager.py(204)main()
-> setup_i18n()
(Pdb) n
> /usr/share/virt-manager/virt-manager.py(205)main()
-> setup_logging()
(Pdb) n
> /usr/share/virt-manager/virt-manager.py(206)main()
-> setup_pypath()
(Pdb) n
> /usr/share/virt-manager/virt-manager.py(207)main()
-> (options, args) = parse_commandline()
(Pdb) n
> /usr/share/virt-manager/virt-manager.py(213)main()
-> import warnings
(Pdb) n
> /usr/share/virt-manager/virt-manager.py(214)main()
-> warnings.filterwarnings('error', module='gtk')
(Pdb) n
> /usr/share/virt-manager/virt-manager.py(215)main()
-> try:
(Pdb) n
> /usr/share/virt-manager/virt-manager.py(216)main()
-> import gtk
(Pdb) n
> /usr/share/virt-manager/virt-manager.py(222)main()
-> warnings.resetwarnings()
(Pdb) n
> /usr/share/virt-manager/virt-manager.py(224)main()
-> import gtk
(Pdb) n
> /usr/share/virt-manager/virt-manager.py(225)main()
-> gtk.gdk.threads_init()
(Pdb) n
> /usr/share/virt-manager/virt-manager.py(227)main()
-> import dbus
(Pdb) n
> /usr/share/virt-manager/virt-manager.py(228)main()
-> import dbus.glib
(Pdb) n
> /usr/share/virt-manager/virt-manager.py(229)main()
-> dbus.glib.threads_init()
(Pdb) n
> /usr/share/virt-manager/virt-manager.py(230)main()
-> import dbus.service
(Pdb) n
> /usr/share/virt-manager/virt-manager.py(233)main()
-> if not options.nofork:
(Pdb) n
> /usr/share/virt-manager/virt-manager.py(234)main()
-> drop_tty()
(Pdb) n
> /usr/share/virt-manager/virt-manager.py(235)main()
-> drop_stdio()