code: def feeds(self):
      if self.is_infer:
          return [self.image]
      else:
          return [
              self.image,
              self.face_box,
              self.head_box,
              self.gt_label,
          ]
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import numpy
  import six
  import paddle.fluid
  from paddle.fluid.param_attr import ParamAttr
  from paddle.fluid.initializer import Xavier
  from paddle.fluid.initializer import Constant
  from paddle.fluid.initializer import Bilinear
  from paddle.fluid.regularizer import L2Decay
label_desc: Use image node_id 2 for calling the PyramidBox obj's underlying member method code with example usage: obj.feeds() and returns: list, list