help:The combination of usrp_fft.py and usrp_spectrum_sense.py

Hi all, i want to combine usrp_fft.py with usrp_spectrum_sense.py to
get a wider range of spectrum sensing in a GUI window.I have tried to
use Brook L.'s idea on the forum
Is that possible combining usrp_fft.py and usrp_spectrum_sense.py to do spectrum analysis and observ - GNU Radio - Ruby-Forum ,however,it failed to set
next frequency .Could anyone offer me some idea about the combination
of usrp_fft.py with usrp_spectrum_sense.py? I really appreciate!
Thanks in advance,
henlenhuang