def storage_keys(self):
        """
        Return a list of the keys for values stored for the module.

        Keys will contain the following metadata entries:
        - '_ctime': storage creation timestamp
        - '_mtime': storage last modification timestamp
        """
        if not self._module:
            return []
        self._storage_init()
        module_name = self._module.module_full_name
        return self._storage.storage_keys(module_name)

        Return a list of the keys for values stored for the module.

        Keys will contain the following metadata entries:
        - '_ctime': storage creation timestamp
        - '_mtime': storage last modification timestamp
        
py3status/py3.py