Created by: phlrain

for e in var:

对于这种写法，slice 在越界得时候，必须抛出 py::index_error类型的异常， python端才能正确捕捉，然后正常终止 for 循环 x.shape = [2,2]

y = x[10]

错误的提示如下 IndexError: The starting index 10 of slice is out of bounds in tensor 0-th axis, it shound be in the range of [-2, 2)