python报错：ValueError: reached ``x=0`` after 0 iterations

Question

问题遇到的现象和发生背景

python报错：ValueError: reached x=0 after 0 iterations

问题相关代码，请勿粘贴截图

复现代码https://github.com/haimiaozh/MetaInv-Net
operator的定义：

operator = odl.tomo.RayTransform(space, geometry,impl='astra_cuda'

报错语句：

x_norm = x.norm()
 if x_norm == 0:
         raise ValueError('reached ``x=0`` after {} iterations'.format(i))

运行结果及报错内容

报错内容：

Traceback (most recent call last):
  File "/root/autodl-tmp/MetaInv-Net-main/main.py", line 17, in <module>
    train = Trainer(args, model, tr_dset=tr_dataset)
  File "/root/autodl-tmp/MetaInv-Net-main/trainer/train.py", line 18, in __init__
    self.proj, self.back_proj, _, self.op_norm = self.tr_dset.radon_op()
  File "/root/autodl-tmp/MetaInv-Net-main/data_loader/dataset.py", line 38, in radon_op
    op_norm=odl.operator.power_method_opnorm(operator)
  File "/root/miniconda3/envs/my-env/lib/python3.6/site-packages/odl/operator/oputils.py", line 246, in power_method_opnorm
    raise ValueError('reached ``x=0`` after {} iterations'.format(i))
ValueError: reached ``x=0`` after 0 iterations

我的解答思路和尝试过的方法

尝试输出operator的值，它的值为RayTransform

我想要达到的结果

Answer 1

x是什么，print(x)或者打个断点，观察观察