code: def recognize_verify_code(image_path, broker="ht"):
      
  
      if broker == "gf":
          return detect_gf_result(image_path)
      if broker in ["yh_client", "gj_client"]:
          return detect_yh_client_result(image_path)
      # 调用 tesseract 识别
      return default_verify_code_detect(image_path)
docs: 识别验证码，返回识别后的字符串，使用 tesseract 实现
      :param image_path: 图片路径
      :param broker: 券商 ['ht', 'yjb', 'gf', 'yh']
      :return recognized: verify code string