以下代码可以很好地屏蔽
mask = targets >= 0
targets = targets[mask]
但是，当我尝试用两个条件进行屏蔽时，它会给出错误RuntimeError: Boolean value of Tensor with more than one value is ambiguous
mask = (targets >= 0 and targets <= 5)
targets = targets[mask]
有没有办法做到这一点？