import uhd

# connect to RFNoc
# might be reasting the fpga blocks need to check
graph = uhd.rfnoc.RfnocGraph("addr=127.0.0.1")

#fft block
fft =  uhd.rfnoc.FftBlockContorl(graph.get_block('0/FFT#0'))
#then you cat see the fft. + TAB the options