docstr: convert nii.gz file to numpy array in the right directory
docstr_tok: ["convert","nii.gz","file","to","numpy","array","in","the","right","directory"]
code: def convert_path(self):
      """convert nii.gz file to numpy array in the right directory"""
      raise NotImplementedError
  
imports: import os
  import os.path
  import sys
  import time
  import glob
  import numpy
  import nibabel
  import SimpleITK
  from tqdm import tqdm
  import json
  from medicalseg.utils import get_image_list
  from tools.preprocess_utils import uncompressor, global_var, add_qform_sform, join_paths
label_desc: Use image node_id 5 for calling the Prep obj's underlying member method code with example usage: obj.convert_path() without return types