Vector Source gr_vector_source_x from gnuradio import gr gr.vector_source_$(type.fcn)($vector, $repeat, $vlen) Output Type type enum Complex complex fcn:c vec_type:complex_vector Float float fcn:f vec_type:real_vector Int int fcn:i vec_type:int_vector Short short fcn:s vec_type:int_vector Byte byte fcn:b vec_type:int_vector Vector vector 0, 0, 0 $type.vec_type Repeat repeat True enum Yes True No False Vec Length vlen 1 int $vlen > 0 out $type $vlen