code: def ioa(boxlist1, boxlist2):
      """Computes pairwise intersection-over-area between box collections.
  
      Intersection-over-area (ioa) between two boxes box1 and box2 is defined as
      their intersection area over box2's area. Note that ioa is not symmetric,
      that is, IOA(box1, box2) != IOA(box2, box1).
  
      Args:
        boxlist1: BoxList holding N boxes
        boxlist2: BoxList holding M boxes
  
      Returns:
        a numpy array with shape [N, M] representing pairwise ioa scores.
      """
      return np_box_ops.ioa(boxlist1.get(), boxlist2.get())
  
imports: from __future__ import absolute_import, division, print_function, unicode_literals
  import numpy
  from .None import np_box_list, np_box_ops
label_desc: Use image node_id 4 for calling a global function with example usage: ioa(boxlist1, boxlist2) and returns: np_box_ops