old_contents: import os
  import pickle
  
  
  class Cache(dict):
      def __init__(self, django_folder, database, cache_path):
          self.filename = os.path.join(
              cache_path,
              "{}_{}.pickle".format(django_folder.replace(os.sep, "_"), database),
          )
  
          if not os.path.exists(os.path.dirname(self.filename)):
              os.makedirs(os.path.dirname(self.filename))
  
          super().__init__()
  
      def load(self):
          try:
              with open(self.filename, "rb") as f:
                  tmp_dict = pickle.load(f)
                  self.update(tmp_dict)
          except OSError:
              pass
  
      def save(self):
          with open(self.filename, "wb") as f:
              pickle.dump(self, f, protocol=2)
  
new_contents: import os
  import pickle
  
  
  class Cache(dict):
      def __init__(self, django_folder, database, cache_path):
          self.filename = os.path.join(
              cache_path,
              "{}_{}.pickle".format(str(django_folder).replace(os.sep, "_"), database),
          )
  
          if not os.path.exists(os.path.dirname(self.filename)):
              os.makedirs(os.path.dirname(self.filename))
  
          super().__init__()
  
      def load(self):
          try:
              with open(self.filename, "rb") as f:
                  tmp_dict = pickle.load(f)
                  self.update(tmp_dict)
          except OSError:
              pass
  
      def save(self):
          with open(self.filename, "wb") as f:
              pickle.dump(self, f, protocol=2)
  
subject: Support `Path` type for `project_root_path`