Guy Eschemann: TypeError: Unexpected type

geschema.py

from myhdl import *

def mpegChannel(clk, rst, s_tx_data_xor_mask_r):

#     table = tuple([9,8,7,6])

    @always_seq(clk.posedge, reset=rst)
    def fsm_seq():
        for i in range(4):
#             s_tx_data_xor_mask_r.next[(i+1)*8:i*8] = table[i]
            s_tx_data_xor_mask_r.next[(i+1)*8:i*8] = i
#             if i == 0:
#                 s_tx_data_xor_mask_r.next[1 + 7:0] = 0
#             elif i == 1:
#                 s_tx_data_xor_mask_r.next[1 + 15:8] = 1
#             elif i == 2:
#                 s_tx_data_xor_mask_r.next[1 + 23:16] = 2
#             else:
#                 s_tx_data_xor_mask_r.next[1 + 31:24] = 3

    return instances()

if __name__ == "__main__":
    clk = Signal(bool(0))
    rst = ResetSignal(0, active=1, async=True)
    s_tx_data_xor_mask_r = Signal(intbv(0)[1 + 31:])

    toVerilog(mpegChannel, clk, rst, s_tx_data_xor_mask_r)
    toVHDL.numeric_ports = False
    toVHDL(mpegChannel, clk, rst, s_tx_data_xor_mask_r)

hello guy toVerilog(mpegChannel, clk, rst, s_tx_data_xor_mask_r)
toVHDL.numeric_ports = False
toVHDL(mpegChannel, clk, rst, s_tx_data_xor_mask_r)