Stream Mux gr_stream_mux from gnuradio import gr gr.stream_mux($type.size*$vlen, $lengths) Type type enum Complex complex size:gr.sizeof_gr_complex Float float size:gr.sizeof_float Int int size:gr.sizeof_int Short short size:gr.sizeof_short Byte byte size:gr.sizeof_char Lengths lengths 1, 1 int_vector Num Inputs num_inputs 2 int Vec Length vlen 1 int $num_inputs > 0 $num_inputs == len($lengths) $vlen > 0 in $type $vlen $num_inputs out $type $vlen