How to use the regipy.RegistryKeyNotFoundException function in regipy

def _get_installed_software(self, subkey_path):
        try:
            uninstall_sk = self.registry_hive.get_key(subkey_path)
        except RegistryKeyNotFoundException as ex:
            logger.error(ex)
            return

        for installed_program in uninstall_sk.iter_subkeys():
            values = {underscore(x.name): x.value for x in
                      installed_program.iter_values(as_json=self.as_json)} if installed_program.values_count else {}
            self.entries.append({
                'service_name': installed_program.name,
                'timestamp': convert_wintime(installed_program.header.last_modified, as_json=self.as_json),
                'registry_path': subkey_path,
                **values

def run(self):
        try:
            installer_subkey = self.registry_hive.get_key(CLASSES_INSTALLER_PATH)
        except RegistryKeyNotFoundException as ex:
            logger.error(ex)
            return

        for entry in installer_subkey.iter_subkeys():
            identifier = entry.name
            timestamp = convert_wintime(entry.header.last_modified, as_json=self.as_json)
            product_name = entry.get_value('ProductName')
            self.entries.append({
                'identifier': identifier,
                'timestamp': timestamp,
                'product_name': product_name,
                'is_hidden': product_name is None
            })

def run(self):
        try:
            tsclient_subkey = self.registry_hive.get_key(TSCLIENT_HISTORY_PATH)
        except (RegistryKeyNotFoundException, NoRegistrySubkeysException) as ex:
            logger.error(ex)
            return

        for server in tsclient_subkey.iter_subkeys():
            self.entries.append({
                'server': server.name,
                'last_connection': convert_wintime(server.header.last_modified, as_json=self.as_json),
                'username_hint': server.get_value('UsernameHint')
            })

def _get_installed_software(self, subkey_path):
        try:
            ras_subkey = self.registry_hive.get_key(subkey_path)
        except RegistryKeyNotFoundException as ex:
            logger.error(ex)
            return

        for entry in ras_subkey.iter_subkeys():
            timestamp = convert_wintime(entry.header.last_modified, as_json=self.as_json)
            self.entries.append({
                'key': subkey_path,
                'name': entry.name,
                'timestamp': timestamp
            })

def _get_installed_software(self, subkey_path):
        try:
            uninstall_sk = self.registry_hive.get_key(subkey_path)
        except RegistryKeyNotFoundException as ex:
            logger.error(ex)
            return

        for installed_program in uninstall_sk.iter_subkeys():
            values = {underscore(x.name): x.value for x in
                      installed_program.iter_values(as_json=self.as_json)} if installed_program.values_count else {}
            self.entries.append({
                'service_name': installed_program.name,
                'timestamp': convert_wintime(installed_program.header.last_modified, as_json=self.as_json),
                'registry_path': subkey_path,
                **values