Streams to Stream gr_streams_to_stream from gnuradio import gr gr.streams_to_stream($type.size*$vlen, $num_streams) IO 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 Num Streams num_streams 2 int Vec Length vlen 1 int $num_streams > 0 $vlen >= 1 in $type $vlen $num_streams out $type $vlen