code: def upload_image():
      # Check if a valid image file was uploaded
      if request.method == "POST":
          if "file" not in request.files:
              return redirect(request.url)
  
          file = request.files["file"]
  
          if file.filename == "":
              return redirect(request.url)
  
          if file and allowed_file(file.filename):
              # The image file seems valid! Detect faces and return the result.
              return detect_faces_in_image(file)
  
      # If no valid image file was uploaded, show the file upload form:
      return """
      <!doctype html>
      <title>Is this a picture of Obama?</title>
      <h1>Upload a picture and see if it's a picture of Obama!</h1>
      <form method="POST" enctype="multipart/form-data">
        <input type="file" name="file">
        <input type="submit" value="Upload">
      </form>
      """
  
imports: import face_recognition
  from flask import Flask, jsonify, request, redirect
label_desc: Use image node_id 2 for calling a global function with example usage: upload_image() and returns: str, redirect, redirect, detect_faces_in_image