💾 Archived View for tris.fyi › pydoc › zlib captured on 2023-01-29 at 03:50:05. Gemini links have been rewritten to link to archived content
⬅️ Previous capture (2022-07-16)
-=-=-=-=-=-=-
The functions in this module allow compression and decompression using the zlib library, which is based on GNU zip. adler32(string[, start]) -- Compute an Adler-32 checksum. compress(data[, level]) -- Compress data, with compression level 0-9 or -1. compressobj([level[, ...]]) -- Return a compressor object. crc32(string[, start]) -- Compute a CRC-32 checksum. decompress(string,[wbits],[bufsize]) -- Decompresses a compressed string. decompressobj([wbits[, zdict]]) -- Return a decompressor object. 'wbits' is window buffer size and container format. Compressor objects support compress() and flush() methods; decompressor objects support decompress() and flush().
with_traceback(...) Exception.with_traceback(tb) -- set self.__traceback__ to tb and return self.
args = <attribute 'args' of 'BaseException' objects>
adler32(data, value=1, /) Compute an Adler-32 checksum of data. value Starting value of the checksum. The returned checksum is an integer.
compress(data, /, level=-1) Returns a bytes object containing compressed data. data Binary data to be compressed. level Compression level, in 0-9 or -1.
compressobj(level=-1, method=8, wbits=15, memLevel=8, strategy=0, zdict=None) Return a compressor object. level The compression level (an integer in the range 0-9 or -1; default is currently equivalent to 6). Higher compression levels are slower, but produce smaller results. method The compression algorithm. If given, this must be DEFLATED. wbits +9 to +15: The base-two logarithm of the window size. Include a zlib container. -9 to -15: Generate a raw stream. +25 to +31: Include a gzip container. memLevel Controls the amount of memory used for internal compression state. Valid values range from 1 to 9. Higher values result in higher memory usage, faster compression, and smaller output. strategy Used to tune the compression algorithm. Possible values are Z_DEFAULT_STRATEGY, Z_FILTERED, and Z_HUFFMAN_ONLY. zdict The predefined compression dictionary - a sequence of bytes containing subsequences that are likely to occur in the input data.
crc32(data, value=0, /) Compute a CRC-32 checksum of data. value Starting value of the checksum. The returned checksum is an integer.
decompress(data, /, wbits=15, bufsize=16384) Returns a bytes object containing the uncompressed data. data Compressed data. wbits The window buffer size and container format. bufsize The initial output buffer size.
decompressobj(wbits=15, zdict=b'') Return a decompressor object. wbits The window buffer size and container format. zdict The predefined compression dictionary. This must be the same dictionary as used by the compressor that produced the input data.
DEFLATED = 8
DEF_BUF_SIZE = 16384
DEF_MEM_LEVEL = 8
MAX_WBITS = 15
ZLIB_RUNTIME_VERSION = '1.2.13'
ZLIB_VERSION = '1.2.13'
Z_BEST_COMPRESSION = 9
Z_BEST_SPEED = 1
Z_BLOCK = 5
Z_DEFAULT_COMPRESSION = -1
Z_DEFAULT_STRATEGY = 0
Z_FILTERED = 1
Z_FINISH = 4
Z_FIXED = 4
Z_FULL_FLUSH = 3
Z_HUFFMAN_ONLY = 2
Z_NO_COMPRESSION = 0
Z_NO_FLUSH = 0
Z_PARTIAL_FLUSH = 1
Z_RLE = 3
Z_SYNC_FLUSH = 2
Z_TREES = 6