old_contents: import os
  import json
  from openpassword import abstract
  
  AGILE_KEYCHAIN_BASE_FILES = ['1password.keys', 'contents.js', 'encryptionKeys.js']
  
  
  class DataSource(abstract.DataSource):
      def __init__(self, path):
          self.base_path = path
          self._default_folder = os.path.join(self.base_path, "data", "default")
  
      def initialise(self, password):
          os.makedirs(self._default_folder)
  
          for f in AGILE_KEYCHAIN_BASE_FILES:
              open(os.path.join(self._default_folder, f), "w+").close()
  
          self.set_password(password)
  
      def is_keychain_initialised(self):
          return self._validate_agile_keychain_base_files() and self._is_valid_folder(self._default_folder)
  
      def add_item(self, item):
          file_handle = open(os.path.join(self._default_folder, "{0}.1password".format(item['id'])), "w")
          json.dump(item, file_handle)
          file_handle.close()
  
      def verify_password(self, password):
          file_handle = open(os.path.join(self._default_folder, "encryptionKeys.js"), "r")
          password_found = False
  
          if password in file_handle.read():
              password_found = True
  
          file_handle.close()
          return password_found
  
      def set_password(self, password):
          file_handle = open(os.path.join(self._default_folder, "encryptionKeys.js"), "w")
          file_handle.write(password)
          file_handle.close()
  
      def _validate_agile_keychain_base_files(self):
          is_initialised = True
          for base_file in AGILE_KEYCHAIN_BASE_FILES:
              current_file = os.path.join(self._default_folder, base_file)
              is_initialised = is_initialised and self._is_valid_file(current_file)
          return is_initialised
  
      def _is_valid_file(self, file):
          return os.path.exists(file) and os.path.isfile(file)
  
      def _is_valid_folder(self, folder):
          return os.path.exists(folder) and os.path.isdir(folder)
  
new_contents: import os
  import json
  from openpassword import abstract
  
  AGILE_KEYCHAIN_BASE_FILES = ['1password.keys', 'contents.js', 'encryptionKeys.js']
  
  
  class DataSource(abstract.DataSource):
      def __init__(self, path):
          self.base_path = path
          self._default_folder = os.path.join(self.base_path, "data", "default")
  
      def initialise(self, password):
          os.makedirs(self._default_folder)
  
          for agile_keychain_base_file in AGILE_KEYCHAIN_BASE_FILES:
              open(os.path.join(self._default_folder, agile_keychain_base_file), "w+").close()
  
          self.set_password(password)
  
      def is_keychain_initialised(self):
          return self._validate_agile_keychain_base_files() and self._is_valid_folder(self._default_folder)
  
      def add_item(self, item):
          file_handle = open(os.path.join(self._default_folder, "{0}.1password".format(item['id'])), "w")
          json.dump(item, file_handle)
          file_handle.close()
  
      def verify_password(self, password):
          file_handle = open(os.path.join(self._default_folder, "encryptionKeys.js"), "r")
          password_found = False
  
          if password in file_handle.read():
              password_found = True
  
          file_handle.close()
          return password_found
  
      def set_password(self, password):
          file_handle = open(os.path.join(self._default_folder, "encryptionKeys.js"), "w")
          file_handle.write(password)
          file_handle.close()
  
      def _validate_agile_keychain_base_files(self):
          is_initialised = True
          for base_file in AGILE_KEYCHAIN_BASE_FILES:
              current_file = os.path.join(self._default_folder, base_file)
              is_initialised = is_initialised and self._is_valid_file(current_file)
          return is_initialised
  
      def _is_valid_file(self, file):
          return os.path.exists(file) and os.path.isfile(file)
  
      def _is_valid_folder(self, folder):
          return os.path.exists(folder) and os.path.isdir(folder)
  
subject: Rename variable f