content: import urllib.request
  from tqdm import tqdm
  
  def download_checkpoint(url, save_path):
      try:
          with urllib.request.urlopen(url) as response, open(save_path, 'wb') as file:
              file_size = int(response.info().get('Content-Length', -1))
              chunk_size = 8192
              num_chunks = file_size // chunk_size if file_size > chunk_size else 1
  
              with tqdm(total=file_size, unit='B', unit_scale=True, desc='Downloading', ncols=100) as pbar:
                  for chunk in iter(lambda: response.read(chunk_size), b''):
                      file.write(chunk)
                      pbar.update(len(chunk))
          
          print(f"Checkpoint downloaded and saved to: {save_path}")
      except Exception as e:
          print(f"Error downloading checkpoint: {e}")
  
  if __name__ == "__main__":
      ckpts = {
          "sam_vit_h_4b8939.pth": "https://huggingface.co/One-2-3-45/code/resolve/main/sam_vit_h_4b8939.pth",
          "zero123-xl.ckpt": "https://huggingface.co/One-2-3-45/code/resolve/main/zero123-xl.ckpt",
          "elevation_estimate/utils/weights/indoor_ds_new.ckpt" : "https://huggingface.co/One-2-3-45/code/resolve/main/elevation_estimate/utils/weights/indoor_ds_new.ckpt",
          "reconstruction/exp/lod0/checkpoints/ckpt_215000.pth": "https://huggingface.co/One-2-3-45/code/resolve/main/SparseNeuS_demo_v1/exp/lod0/checkpoints/ckpt_215000.pth"
      }
      for ckpt_name, ckpt_url in ckpts.items():
          print(f"Downloading checkpoint: {ckpt_name}")
          download_checkpoint(ckpt_url, ckpt_name)
  
  