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12.3.2 Sequential (de)compression

12.3.2 Sequential (de)compression

Sequential compression and decompression is done using the classes BZ2Compressor and BZ2Decompressor.

class BZ2Compressor( [compresslevel])
Create a new compressor object. This object may be used to compress data sequentially. If you want to compress data in one shot, use the compress() function instead. The compresslevel parameter, if given, must be a number between 1 and 9; the default is 9.

compress( data)
Provide more data to the compressor object. It will return chunks of compressed data whenever possible. When you've finished providing data to compress, call the flush() method to finish the compression process, and return what is left in internal buffers.

flush( )
Finish the compression process and return what is left in internal buffers. You must not use the compressor object after calling this method.

class BZ2Decompressor( )
Create a new decompressor object. This object may be used to decompress data sequentially. If you want to decompress data in one shot, use the decompress() function instead.

decompress( data)
Provide more data to the decompressor object. It will return chunks of decompressed data whenever possible. If you try to decompress data after the end of stream is found, EOFError will be raised. If any data was found after the end of stream, it'll be ignored and saved in unused_data attribute.

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