Dvi object in which these opcodes are allowed.

    args : list[str], default: ['raw']
        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
    c