Megvii-BaseDetection / Megvii-BaseDetection/YOLOX
When loading two Dataloader at the same time, the second dataloader gets stuck when executing the next function
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- Python
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Description
I want each batch to always consist of images from two different datasets.
I tried to define two prefetchers or define two dataloader, but either way I stopped there when executing the following statement.
inps2,targets2,,=next(self.prefetcher2)
How can I combine images from two datasets in one batch?
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First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
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Research direction
Start by tracing how the two dataloaders or prefetchers are created and where self.prefetcher2 is consumed by next(). Reproduce the hang with two datasets, then establish a documented way for one batch to contain images from both datasets and verify that the second iterator advances.
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Assessment
- Tech stack
- python, pytorch
- Domain
- data, machine-learning
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 25/100