code: def _determine_padding(shape, padded_size, block_size):
      # all kernels assume equal size along both axes, so pad up to equal size if
      # shape is not isotropic
      orig_sy, orig_sx = shape
      if orig_sx != padded_size or orig_sy != padded_size:
          padding_width = (
              (0, padded_size - orig_sy),
              (0, padded_size - orig_sx),
          )
      else:
          padding_width = None
      return padding_width
  
imports: import math
  import numbers
  import os
  import cupy
  from ._util import _get_inttype
label_desc: Use image node_id 7 for calling a global function with example usage: _determine_padding(shape, padded_size, block_size) and returns: padding_width