code: def download(model_name):
      url = MODELS_MAP[model_name]["url"]
      os.system(f"wget {url} ./")
  
      return f"./{model_name}.ckpt"
  
imports: import argparse
  import math
  import os
  from copy import deepcopy
  import torch
  from audio_diffusion.models import DiffusionAttnUnet1D
  from diffusion import sampling
  from torch import nn
  from diffusers import DanceDiffusionPipeline, IPNDMScheduler, UNet1DModel
label_desc: Use image node_id 3 for calling a global function with example usage: download(model_name) and returns: str, model_name, str