def __init__(self, nfiles=<NUM_LIT:1>, tmp_prefix=None):
self._fnames = ['<STR_LIT>'.format(i) for i in range(nfiles)]<EOL>self._tmpprefix = tmp_prefix<EOL>self._fids = []<EOL>
Initialization of instances:

        Args:
            nfiles (int): number of files. Defaults to 1.
            tmp_prefix (str): prefix name of temporary files. Use this
                parameter if you want to easily track down the temporary files
                created by the manager.