IndexError: list index out of range

for each, epoch in model_list2[:-1:(len(model_list2)//10)+1][:2] + [model_list2[-1]]:
    state = torch.load(f'{each}', map_location=lambda storage, loc: storage)
    doc_weights = state['doc_weights.weight'].cpu().clone().numpy()

    # distribution over the topics for each document
    topic_dist = softmax(doc_weights)

    # distribution of nonzero probabilities
    dist = topic_dist.reshape(-1)
    plt.hist(dist[dist > 0.01], bins=40);
    plt.title(f'epoch: {epoch}')
    plt.show()