# How to get a Dataloader from a Trainer?
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**Author:**  [@univanxx](/static-proxy?url=https%3A%2F%2Fdiscuss.huggingface.co%2Fu%2Funivanxx)%5C
**Post date:** [July 21, 2023, 2:44pm UTC](/static-proxy?url=https%3A%2F%2Fdiscuss.huggingface.co%2Ft%2Fhow-to-get-a-dataloader-from-a-trainer%2F47626%2F1 "2023-07-21T14:44:48Z")
Hello, does anyone know how to get a train Dataloader from a Trainer? I need it to compute some metrics during training process on a training dataset but I don’t want to initialize Dataloader twice due to memory limits.
Or does transformers Trainer us it’s own data storage structures? It would be great to hear some advices!
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**Author:**  [@univanxx](/static-proxy?url=https%3A%2F%2Fdiscuss.huggingface.co%2Fu%2Funivanxx)%5C
**Post date:** [July 21, 2023, 4:24pm UTC](/static-proxy?url=https%3A%2F%2Fdiscuss.huggingface.co%2Ft%2Fhow-to-get-a-dataloader-from-a-trainer%2F47626%2F2 "2023-07-21T16:24:18Z")
Well, I found it. I`m using [on\_evaluate()](https://huggingface.co/docs/transformers/main_classes/callback#transformers.TrainerCallback.on_evaluate) callback and train\_dataloader parameter is contained in the [\*\*kwargs argument](https://github.com/huggingface/transformers/blob/e42587f596181396e1c4b63660abf0c736b10dae/src/transformers/trainer_callback.py#L179-L180) of this function.
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**Author:**  [@Thytu](/static-proxy?url=https%3A%2F%2Fdiscuss.huggingface.co%2Fu%2FThytu)%5C
**Post date:** [March 5, 2024, 7:19pm UTC](/static-proxy?url=https%3A%2F%2Fdiscuss.huggingface.co%2Ft%2Fhow-to-get-a-dataloader-from-a-trainer%2F47626%2F3 "2024-03-05T19:19:27Z")
Answering here as I ask myself the same question few days ago:
`Trainer` does indeed provide a way to retrieve the dataloader(s), actually it even provide three methods:
- `trainer.get_train_dataloader()`
- `trainer.get_eval_dataloader()`
- `trainer.get_test_dataloader()`
By utilizing these methods you can access the dataloaders without needing to initialize new ones.
I hope this response (even late) proves itself helpful to someone ^^