[Discuss-gnuradio] "vector size" instead of the "regular size" in class/object definition

Hi folks,

is it possible to modify the input size at python level by using vectors ? What I specifically mean is that I want to build a hierachical block and giving it as input two vectors :

class error_rate_vector_iif(gr.hier_block2):

        #init
        gr.hier_block2.__init__(
            self, 'error_rate_vector_iif',
            gr.io_signature(2, 2, gr.sizeof_int,
            gr.io_signature(1, 1, gr.sizeof_float),
        )

So my question is, is there a way to use a sort of "fictional" gr.sizeofvector_int instead of gr.sizeof_int size in the definition of my python class ? Basically, I need to compare two vectors and increase a counter while a difference between their elements is spotted......can anybody help me ?

thank you in advance as always

Kind Regards,

              Arturo