pynnio.py 文件源码

def _write_file_contents(self, data, metadata):
        # we explicitly set the dtype to ensure roundtrips preserve file contents exactly
        max_metadata_length = max(chain([len(k) for k in metadata.keys()],
                                        [len(str(v)) for v in metadata.values()]))
        if PY2:
            dtype = "S%d" % max_metadata_length
        else:
            dtype = "U%d" % max_metadata_length
        metadata_array = numpy.array(sorted(metadata.items()), dtype)
        numpy.savez(self.filename, data=data, metadata=metadata_array)