class numpy.DataSource(destpath='.')

memmap.flush()

numpy.save(file, arr, allow_pickle=True, fix_imports=True)

numpy.fromstring(string, dtype=float, count=-1, sep='') A new 1-D array initialized from raw binary or text data in a string

ndarray.tofile(fid, sep="", format="%s") Write array to a file as text or binary (default). Data is always written