Decompress.flush([length]) All pending input is processed, and a bytes object containing the remaining uncompressed output is returned. After calling flush(), the decompress() method cannot be called again; the only realistic action is to delete the object. The optional parameter length sets the initial size of the output buffer.

Decompress.eof A boolean indicating whether the end of the compressed data stream has been reached. This makes it possible to distinguish between a properly-formed compressed stream, and an incomplete or truncated one. New in version 3.3.

Decompress.decompress(data[, max_length]) Decompress data, returning a bytes object containing the uncompressed data corresponding to at least part of the data in string. This data should be concatenated to the output produced by any preceding calls to the decompress() method. Some of the input data may be preserved in internal buffers for later processing. If the optional parameter max_length is non-zero then the return value will be no longer than max_length. This may mean that not all of

Decompress.copy() Returns a copy of the decompression object. This can be used to save the state of the decompressor midway through the data stream in order to speed up random seeks into the stream at a future point.

zlib.decompress(data[, wbits[, bufsize]]) Decompresses the bytes in data, returning a bytes object containing the uncompressed data. The wbits parameter depends on the format of data, and is discussed further below. If bufsize is given, it is used as the initial size of the output buffer. Raises the error exception if any error occurs. The wbits parameter controls the size of the history buffer (or “window size”), and what header and trailer format is expected. It is similar to the parameter

zlib.crc32(data[, value]) Computes a CRC (Cyclic Redundancy Check) checksum of data. The result is an unsigned 32-bit integer. If value is present, it is used as the starting value of the checksum; otherwise, a default value of 0 is used. Passing in value allows computing a running checksum over the concatenation of several inputs. The algorithm is not cryptographically strong, and should not be used for authentication or digital signatures. Since the algorithm is designed for use as a check

zlib.compressobj(level=-1, method=DEFLATED, wbits=15, memLevel=8, strategy=Z_DEFAULT_STRATEGY[, zdict]) Returns a compression object, to be used for compressing data streams that won’t fit into memory at once. level is the compression level – an integer from 0 to 9 or -1. A value of 1 is fastest and produces the least compression, while a value of 9 is slowest and produces the most. 0 is no compression. The default value is -1 (Z_DEFAULT_COMPRESSION). Z_DEFAULT_COMPRESSION represents a defau

Compress.flush([mode]) All pending input is processed, and a bytes object containing the remaining compressed output is returned. mode can be selected from the constants Z_SYNC_FLUSH, Z_FULL_FLUSH, or Z_FINISH, defaulting to Z_FINISH. Z_SYNC_FLUSH and Z_FULL_FLUSH allow compressing further bytestrings of data, while Z_FINISH finishes the compressed stream and prevents compressing any more data. After calling flush() with mode set to Z_FINISH, the compress() method cannot be called again; the

Compress.copy() Returns a copy of the compression object. This can be used to efficiently compress a set of data that share a common initial prefix.

Compress.compress(data) Compress data, returning a bytes object containing compressed data for at least part of the data in data. This data should be concatenated to the output produced by any preceding calls to the compress() method. Some input may be kept in internal buffers for later processing.