processor_config.json

{
  "processor_class": "CaptchaProcessor",
  "vocab": "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789",
  "auto_map": {
    "AutoProcessor": "processing_captcha.CaptchaProcessor"
  }
}