def GetKeyByPath(self, key_path):
root_key_path, _, key_path = key_path.partition(<EOL>definitions.KEY_PATH_SEPARATOR)<EOL>root_key_path = root_key_path.upper()<EOL>root_key_path = self._ROOT_KEY_ALIASES.get(root_key_path, root_key_path)<EOL>if root_key_path not in self._ROOT_KEYS:<EOL><INDENT>raise RuntimeError('<STR_LIT>'.format(root_key_path))<EOL><DEDENT>key_path = definitions.KEY_PATH_SEPARATOR.join([root_key_path, key_path])<EOL>key_path_upper = key_path.upper()<EOL>for virtual_key_path, virtual_key_callback in self._VIRTUAL_KEYS:<EOL><INDENT>virtual_key_path_upper = virtual_key_path.upper()<EOL>if key_path_upper.startswith(virtual_key_path_upper):<EOL><INDENT>key_path_suffix = key_path[len(virtual_key_path):]<EOL>callback_function = getattr(self, virtual_key_callback)<EOL>virtual_key = callback_function(key_path_suffix)<EOL>if not virtual_key:<EOL><INDENT>raise RuntimeError('<STR_LIT>'.format(<EOL>virtual_key_path))<EOL><DEDENT>return virtual_key<EOL><DEDENT><DEDENT>key_path_prefix_upper, registry_file = self._GetFileByPath(key_path_upper)<EOL>if not registry_file:<EOL><INDENT>return None<EOL><DEDENT>if not key_path_upper.startswith(key_path_prefix_upper):<EOL><INDENT>raise RuntimeError('<STR_LIT>')<EOL><DEDENT>key_path_suffix = key_path[len(key_path_prefix_upper):]<EOL>key_path = key_path_suffix or definitions.KEY_PATH_SEPARATOR<EOL>return registry_file.GetKeyByPath(key_path)<EOL>
Retrieves the key for a specific path.

        Args:
          key_path (str): Windows Registry key path.

        Returns:
          WinRegistryKey: Windows Registry key or None if not available.

        Raises:
          RuntimeError: if the root key is not supported.