On Sat, Aug 27, 2011 at 4:50 PM, "Martin v. Löwis" <mar...@v.loewis.de> wrote: >> The implementation will also be similar to bz2 - basic compressor and >> decompressor classes written in C, with convenience functions and a file >> interface implemented on top of those in Python. > > When I reviewed lzma, I found that this approach might not be > appropriate. lzma has many more options and aspects that allow tuning > and selection, and a Python LZMA library should provide the same feature > set as the underlying C library. > > So I would propose that a very thin C layer is created around the C > library that focuses on the actual algorithms, and that any higher > layers (in particular file formats) are done in Python.
I probably shouldn't have used the word "basic" here - these classes expose all the features of the underlying library. I was rather trying to underscore that the rest of the module is implemented in terms of these two classes. As for file formats, these are handled by liblzma itself; the extension module just selects which compressor/decompressor initializer function to use depending on the value of the "format" argument. Our code won't contain anything along the lines of GzipFile; all of that work is done by the underlying C library. Rather, the LZMAFile class will be like BZ2File - just a simple filter that passes the read/written data through a LZMACompressor or LZMADecompressor as appropriate. Cheers, Nadeem _______________________________________________ Python-Dev mailing list Python-Dev@python.org http://mail.python.org/mailman/listinfo/python-dev Unsubscribe: http://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
