!14384 fix np arange when tensor has shape 0 in it

From: @yanglf1121
Reviewed-by: @liangchenghui,@zhunaipan
Signed-off-by: @liangchenghui
pull/14384/MERGE
mindspore-ci-bot 4 years ago committed by Gitee
commit adc24f4263

@ -450,6 +450,8 @@ def _tuple_setitem(tup, idx, value):
def _iota(dtype, num, increasing=True):
"""Creates a 1-D tensor with value: [0,1,...num-1] and dtype."""
# TODO: Change to P.Linspace when the kernel is implemented on CPU.
if num <= 0:
raise ValueError("zero shape Tensor is not currently supported.")
if increasing:
return Tensor(list(range(int(num))), dtype)
return Tensor(list(range(int(num)-1, -1, -1)), dtype)

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