Function _get_jump_target

Lib/dis.py:343–359

Gets the bytecode offset of the jump target if this is a jump instruction. Otherwise return None.

(op, arg, offset)

    return _inline_cache_entries.get(opname, 0)

def _get_jump_target(op, arg, offset):
    """Gets the bytecode offset of the jump target if this is a jump instruction.

    Otherwise return None.
    """
    deop = _deoptop(op)
    caches = _get_cache_size(_all_opname[deop])
    if deop in hasjrel:
        if _is_backward_jump(deop):
            arg = -arg
        target = offset + 2 + arg*2
        target += 2 * caches
    elif deop in hasjabs:
        target = arg*2
    else:
        target = None
    return target

class Instruction(_Instruction):
    """Details for a bytecode operation.