code: def get_iterator(cls):
      if cls.num_threads > 1:
          return prange
      else:
          return range
  
file_path: ffcv/ffcv/pipeline/compiler.py
imports: import pdb
  from numba import njit, set_num_threads, prange, warnings, get_num_threads
  from numba.core.errors import NumbaPerformanceWarning
  from multiprocessing import cpu_count
  import torch
  import warnings
label_desc: Use image node_id 4 for calling the Compiler obj's underlying member method code with example usage: obj.get_iterator(cls) and returns: prange, range