code: def columns_to_stripes_and_swap_idx(col0, col1):
      stripe0 = int(col0 / 4)
      col0 %= 4
      stripe1 = int(col1 / 4)
      col1 %= 4
  
      idx = 0
      for c0 in range(4):
          for c1 in range(4):
              if c0 == col0 and c1 == col1:
                  return stripe0, stripe1, idx
              idx += 1
      return None
  
file_path: apex/apex/contrib/sparsity/permutation_search_kernels/channel_swap.py
imports: from .permutation_utilities import *
label_desc: Use image node_id 3 for calling a global function with example usage: columns_to_stripes_and_swap_idx(col0, col1) and returns: None, stripe0,  stripe1,  idx