code: def check_y_again(y):
      if y is None:
          raise ValueError("'y' attribute in Explainer is missing")
      if isinstance(y[0], str):
          raise ValueError(
              "'y' attribute in Explainer is of string type and it should be numerical "
              "to allow for calculations"
          )
  
imports: import numpy
  import pandas
  from copy import deepcopy
  from warnings import warn
  from .helper import verbose_cat, is_y_in_data, get_model_info
  from .yhat import get_predict_function_and_model_type
label_desc: Use image node_id 5 for calling a global function with example usage: check_y_again(y) without return types