import torch
from torch.utils.data import TensorDataset


def make_context_pairs(data: bytes, context_length: int) -> TensorDataset:
    data = torch.tensor(data, dtype=torch.uint8)
    sample_count = data.shape[0] - context_length
    x = data.unfold(0, context_length, 1)[:sample_count]
    y = data[context_length:]
    return TensorDataset(x, y)