code: def check_changes(root, db):
      res = False
      new_db = {}
  
      setup_filename = "setup.py"
      hash_add(".", setup_filename, new_db)
      if hash_changed(".", setup_filename, db):
          res = True
  
      for base, _, files in os.walk(root):
          for filename in files:
              if filename.endswith(".pxd"):
                  hash_add(base, filename, new_db)
                  if hash_changed(base, filename, db):
                      res = True
  
      if res:
          db.clear()
          db.update(new_db)
      return res
  
file_path: neuralcoref/bin/cythonize.py
imports: import os
  import sys
  import json
  import hashlib
  import subprocess
  import argparse
label_desc: Use image node_id 9 for calling a global function with example usage: check_changes(root, db) and returns: res