code: def prepare(self, ctx_id, **kwargs):
      if ctx_id < 0:
          self.session.set_providers(["CPUExecutionProvider"])
  
file_path: insightface/web-demos/src_recognition/arcface_onnx.py
imports: import numpy
  import cv2
  import onnx
  import onnxruntime
  import face_align
label_desc: Use image node_id 2 for calling the ArcFaceONNX obj's underlying member method code with example usage: obj.prepare(ctx_id) without return types