code: def prepare(self, ctx_id, **kwargs):
      if ctx_id < 0:
          self.session.set_providers(["CPUExecutionProvider"])
  
file_path: insightface/python-package/insightface/model_zoo/landmark.py
imports: from __future__ import division
  import numpy
  import cv2
  import onnx
  import onnxruntime
  from ..utils import face_align
  from ..utils import transform
  from ..data import get_object
label_desc: Use image node_id 2 for calling the Landmark obj's underlying member method code with example usage: obj.prepare(ctx_id) without return types