Pytorch num_workers＞1, dataloader 错误 “DataLoader worker (pid xxx) is killed by signal” 解决方法

出现此现象，一种可能的原因是使用了jupyter执行程序导致，jupyter似乎不支持创建子进程。

代码如下：

import torch,os,math

class MyIterableDataset(torch.utils.data.IterableDataset):
    def __init__(self, start, end):
        super(MyIterableDataset).__init__()
        assert end > start, "this example code only works with end >= start"
        self.start = start
        self.end = end
    def __iter__(self):
        worker_info = torch.utils.data.get_worker_info()
        if worker_info is None:  # single-process data loading, return the full iterator
            iter_start = self.start
            iter_end = self.end
        else:  # in a worker process
            # split workload
            per_worker = int(math.ceil((self.end - self.start) / float(worker_info.num_workers)))
            worker_id = worker_info.id
            iter_start = self.start + worker_id * per_worker
            iter_end = min(iter_start + per_