code: def _upsample(self, x, scale=1):
      return F.upsample(x, scale_factor=scale, mode="bilinear")
  
file_path: PaddleOCR/ppocr/modeling/heads/det_ct_head.py
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import math
  import paddle
  from paddle import nn
  import paddle.nn.functional
  from paddle import ParamAttr
  import math
  from paddle.nn.initializer import TruncatedNormal, Constant, Normal
label_desc: Use image node_id 2 for calling the CT_Head obj's underlying member method code with example usage: obj._upsample(x, scale) and returns: F