Pad Source pad_source #if str($type) == "message" None;self.message_port_register_hier_out($label) #end if Label label in string Output 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 Message message size:0 Wildcard size:0 Vec Length vlen 1 int Optional optional False bool part Optional True Required False $vlen > 0 out $type $vlen The outputs of this block will become the inputs to this flow graph when it is instantiated as a hierarchical block. Pad sources will be ordered alphabetically by their ids. The first pad source will have an index of 0.