code: def mcc(preds: List[int], labels: List[int]):
      return {"mcc": matthews_corrcoef(labels, preds)}
  
imports: from typing import Dict, List
  from scipy.stats import pearsonr, spearmanr
  from sklearn.metrics import f1_score, matthews_corrcoef
label_desc: Use image node_id 3 for calling a global function with example usage: mcc(preds, labels) and returns: dict