code: def run_mypy(rel_path: str) -> bool:
      cmd = ["mypy", os.path.join(ROOT, rel_path)]
  
      return check_cmd_print_failure_assistance(cmd)
  
file_path: xgboost/tests/ci_build/lint_python.py
imports: import argparse
  import os
  import pathlib
  import subprocess
  import sys
  from collections import Counter
  from multiprocessing import Pool, cpu_count
  from typing import Dict, List, Tuple
  from test_utils import PY_PACKAGE, ROOT, cd, print_time, record_time
label_desc: Use image node_id 4 for calling a global function with example usage: run_mypy(rel_path) and returns: check_cmd_print_failure_assistance