how to use Llama-2，it is not run in this model

[fengyun691340]

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[ShihaoZhaoZSH]

As mentioned in the README, you need to first download the pre-trained Llama-2-7b. Then, you should modify the python script in run.sh to llama2_unet.py, uncomment --llama2_dir argument in run.sh and set it to the directory where you have downloaded the Llama-2 model. Finally, execute the run.sh script.