Gzip1

class astropy.io.fits.hdu.compressed._codecs.Gzip1

Bases: Codec

The FITS GZIP 1 compression and decompression algorithm.

The Gzip algorithm is used in the free GNU software compression utility of the same name. It was created by J. L. Gailly and M. Adler, based on the DEFLATE algorithm (Deutsch 1996), which is a combination of LZ77 (Ziv & Lempel 1977) and Huffman coding.

Attributes Summary

codec_id

Methods Summary

decode(buf)	Decompress buffer using the GZIP_1 algorithm.
encode(buf)	Compress the data in the buffer using the GZIP_1 algorithm.

Attributes Documentation

codec_id = 'FITS_GZIP1'

Methods Documentation

decode(buf)

Decompress buffer using the GZIP_1 algorithm.

Parameters:

bufbytes or array_like

The buffer to decompress.

Returns:

bufnp.ndarray

The decompressed buffer.

encode(buf)

Compress the data in the buffer using the GZIP_1 algorithm.

Parameters:

buf _like

The buffer to compress.

Returns:

bytes

The compressed bytes.