What is the label format of the cifar-10 dataset?

Hello,
I tried to modify the cifar-10 image dataset into the ECG dataset MIT through the official moco demo code to do the transfer learning of comparative learning.
My current problem is that the moco demo is a packaged cifar10 dataset library that is directly imported. I need to upload the MIT dataset locally, but I don’t know what format the label file of the packaged cifar-10 dataset library is in, because The code provided by the demo only uses data, so I can only get the format of the data but not the format of the label file of the cifar-10 dataset. I have saved the ecg data and labels of the MIT dataset into two .npy arrays, and made corresponding modifications according to the data format in the demo, but I don't know what format the label file of the original cifar-10 dataset should be?
Could someone please help me solve this problem and tell me what is the format of the label of the demo packaged cifar-10 dataset library? Looking forward to it and thank you for your help!