human
Complete the below
def _dispatch(table, min, max=None, state=None, args=(u'raw',)):

    ''''Decorator for dispatch by opcode. Sets the values in *table*
    from *min* to *max* to this method, adds a check that the Dvi state
    matches *state* if not None, reads arguments from the file according
    to *args*.
    *table*
    the dispatch table to be filled in
    *min*
    minimum opcode for calling this function
    *max*
    maximum opcode for calling this function, None if only *min* is allowed
    *state*
    state of the Dvi object in which these opcodes are allowed
    *args*
    sequence of argument specifications:
    ``\'raw\'``: opcode minus minimum
    ``\'u1\'``: read one unsigned byte
    ``\'u4\'``: read four bytes, treat as an unsigned number
    ``\'s4\'``: read four bytes, treat as a signed number
    ``\'slen\'``: read (opcode - minimum) bytes, treat as signed
    ``\'slen1\'``: read (opcode - minimum + 1) bytes, treat as signed
    ``\'ulen1\'``: read (opcode - minimum + 1) bytes, treat as unsigned
    ``\'olen1\'``: read (opcode - minimum + 1) bytes, treat as unsigned
    if under four bytes, signed if four bytes'
    '''
assistant
#Here is the Python program you requested.
    def decorate(method):
        get_args = [_arg_mapping[x] for x in args]
        @wraps(method)
        def wrapper(self, byte):
            if ((state is not None) and (self.state != state)):
                raise ValueError(u'state    precondition    failed')
            return method(self, *[f(self, (byte - min)) for f in get_args])
        if (max is None):
            table[min] = wrapper
        else:
            for i in xrange(min, (max + 1)):
                assert (table[i] is None)
                table[i] = wrapper
        return wrapper
    return decorate