Usrp_fft.py data acquisition

Hello,

I am very new to GNU radio and USRP and have been using the functions
usrp_siggen.py and usrp_fft.py to transmit and display various
functions,
such as sine waves. When I use usrp_fft.py I am able to get the
spectrum on
the gui and see a nice impulse for a sine wave, but is there a way to
alter
the python code to retrieve the actual stream of data in a file? I’d
like
to do some analysis on the data for a long period of time. If you need
any
information about the hardware, I can provide that for you.

David