Chapter 4 DataLoader error: TypeError: 'int' object is not callable

[alpanaytekin]

Hello
img, label = next(iter(train_dataloader))
command gives the following error:

Process Process-11:
Traceback (most recent call last):
  File "/usr/lib/python3.10/multiprocessing/process.py", line 314, in _bootstrap
    self.run()
  File "/usr/lib/python3.10/multiprocessing/process.py", line 108, in run
    self._target(*self._args, **self._kwargs)
  File "/usr/local/lib/python3.10/dist-packages/torch/utils/data/_utils/worker.py", line 225, in _worker_loop
    torch.manual_seed(seed)
TypeError: 'int' object is not callable
---------------------------------------------------------------------------
RuntimeError                              Traceback (most recent call last)
[/usr/local/lib/python3.10/dist-packages/torch/utils/data/dataloader.py](https://localhost:8080/#) in _try_get_data(self, timeout)
   1131         try:
-> 1132             data = self._data_queue.get(timeout=timeout)
   1133             return (True, data)

10 frames
RuntimeError: DataLoader worker (pid 16408) exited unexpectedly with exit code 1. Details are lost due to multiprocessing. Rerunning with num_workers=0 may give better error trace.

The above exception was the direct cause of the following exception:

RuntimeError                              Traceback (most recent call last)
[/usr/local/lib/python3.10/dist-packages/torch/utils/data/dataloader.py](https://localhost:8080/#) in _try_get_data(self, timeout)
   1143             if len(failed_workers) > 0:
   1144                 pids_str = ', '.join(str(w.pid) for w in failed_workers)
-> 1145                 raise RuntimeError(f'DataLoader worker (pid(s) {pids_str}) exited unexpectedly') from e
   1146             if isinstance(e, queue.Empty):
   1147                 return (False, None)

RuntimeError: DataLoader worker (pid(s) 16408) exited unexpectedly

This codeblock was working fine a few days ago.
I wonder what changed?
Has anyone experienced the same issue?

[mrdbourke]

Hi @alpanaytekin ,

Let's try get this fixed.

Where are you running your code?

Have you tried anything else? Did you try to close your environment and start again?

[alpanaytekin]

Hi @mrdbourke ,

I'm working on Google Colab Free Version.
Current situations is as follows:

img, label = next(iter(train_dataloader))
on section 4.1 works fine

img_custom, label_custom = next(iter(train_dataloader_custom))
on section 5.4 works also fine

image_batch, label_batch = next(iter(train_dataloader_simple))
on section 7.3 outputs the "TypeError: 'int' object is not callable" error.

I haven't tried it on another environment yet. I can try it on a local machine instead of Colab and share the results. Need to setup a local machine first.