Why there is no data send to data_collator?

[Luoyang144]

System Info

• transformers version: 4.27.0.dev0
• Platform: Linux-3.10.0-514.el7.x86_64-x86_64-with-centos-7.3.1611-Core
• Python version: 3.7.13
• Huggingface_hub version: 0.12.0
• PyTorch version (GPU?): 1.13.1+cu117 (True)
• Tensorflow version (GPU?): not installed (NA)
• Flax version (CPU?/GPU?/TPU?): not installed (NA)
• Jax version: not installed
• JaxLib version: not installed
• Using GPU in script?:
• Using distributed or parallel set-up in script?:

Who can help?

@sgugger

Information

• [ ] The official example scripts
• [X] My own modified scripts

Tasks

• [ ] An officially supported task in the examples folder (such as GLUE/SQuAD, ...)
• [X] My own task or dataset (give details below)

Reproduction

I'm tring to us code below

And get error KeyError: 'seq2seq', after output feature input to data_collator, get output like follow: [{}, {}, {}, {}] Why this happened? I output train dataset and get correct result, but when using trainer.train() it can get data I need. train.txt

Expected behavior

How can I send data in training process? Thanks for your help.

[sgugger]

That's related to the data you are preprocessing, not the Transformers library or its examples. There is simply no "seq2seq2" in the features you prepare with your function. I suggest posting on the forums to get help from the larger community.

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