at the very very top of your script, add a line:
from System import Int32
and then in your signs list you have to change:
signs = List[int]((0x0BD2, 0x0B96, 0x0BA4, 0x0BA6, 0x0BA8, 0x0BAA,
to
signs = List[Int32]((0x0BD2, 0x0B96, 0x0BA4, 0x0BA6, 0x0BA8, 0x0BAA,