Keep M in N gr_keep_m_in_n from gnuradio import gr gr.keep_m_in_n($type.size, $m, $n, $offset) set_offset($offset) 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 M m 1 int N n 2 int initial offset offset 0 int $n > 0 $m > 0 $m < $n in $type $n out $type $m