astropy.io.fits.hdu.streaming:StreamingHDU.write

Notes

Only the amount of data specified in the header provided to the class constructor may be written to the stream. If the provided data would cause the stream to overflow, an OSError exception is raised and the data is not written. Once sufficient data has been written to the stream to satisfy the amount specified in the header, the stream is padded to fill a complete FITS block and no more data will be accepted. An attempt to write more data after the stream has been filled will raise an OSError exception. If the dtype of the input data does not match what is expected by the header, a TypeError exception is raised.