code: def mse(y_pred, y_true):
      return ((y_pred - y_true) ** 2).mean()
  
file_path: DALEX/python/dalex/dalex/model_explanations/_model_performance/utils.py
imports: import numpy
  import pandas
label_desc: Use image node_id 1 for calling a global function with example usage: mse(y_pred, y_true) and returns: unknown