Python binding: add streaming compression / decompression support. #39

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claunia · 2026-01-29T20:29:36Z

claunia commented

2026-01-29 20:29:36 +00:00

Originally created by @rpasta42 on GitHub (Oct 1, 2015).

I'm trying to implement streaming compression using brotli. There's very little documentation and I haven't found anyone else trying to accomplish same thing. I assume I need to specify lgwin to set the block size, but when I run this code it gives me an error "brotli.error: BrotliDecompress failed"

my_str = 'very long string blah blah blah'
a = brotli.compress(my_str, lgwin=16)
b = brotli.decompress(a[0:16])

Am I doing something wrong or did I misunderstand the purpose of the lgwin parameter?

Originally created by @rpasta42 on GitHub (Oct 1, 2015). I'm trying to implement streaming compression using brotli. There's very little documentation and I haven't found anyone else trying to accomplish same thing. I assume I need to specify lgwin to set the block size, but when I run this code it gives me an error "brotli.error: BrotliDecompress failed" my_str = 'very long string blah blah blah' a = brotli.compress(my_str, lgwin=16) b = brotli.decompress(a[0:16]) Am I doing something wrong or did I misunderstand the purpose of the lgwin parameter?

claunia closed this issue

2026-01-29 20:29:37 +00:00

claunia commented

2026-01-29 20:29:38 +00:00

@eustas commented on GitHub (Oct 6, 2015):

Currently python brotli module doesn't support streaming compression/decompression.
lgwin is a parameter that is used to specify the length of LZ77 sliding window size.

Of course, streaming support will be eventually added to the Python bindings,... So stay tuned.

@eustas commented on GitHub (Oct 6, 2015): Currently python brotli module doesn't support streaming compression/decompression. lgwin is a parameter that is used to specify the length of LZ77 sliding window size. Of course, streaming support will be eventually added to the Python bindings,... So stay tuned.

claunia commented

2026-01-29 20:29:38 +00:00

@Kijewski commented on GitHub (Mar 23, 2016):

Of course, streaming support will be eventually added to the Python bindings,... So stay tuned.

Do you have a more precise ETA by now? More precise than "eventually" I mean.

@Kijewski commented on GitHub (Mar 23, 2016): > Of course, streaming support will be eventually added to the Python bindings,... So stay tuned. Do you have a more precise ETA by now? More precise than "eventually" I mean.

claunia commented

2026-01-29 20:29:38 +00:00

@rpasta42 commented on GitHub (Apr 5, 2016):

I know C++ and Python, but have no familiarity with brotli codebase.

Where would I begin if I wanted to implement the Python binding for this?

@rpasta42 commented on GitHub (Apr 5, 2016): I know C++ and Python, but have no familiarity with brotli codebase. Where would I begin if I wanted to implement the Python binding for this?

claunia referenced this issue

2026-01-29 20:46:28 +00:00

[PR #39] [MERGED] separate the licenses from documentation #624

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Reference: starred/brotli#39