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miurahr / pyppmd

pyppmd provides classes and functions for compressing and decompressing text data, using PPM (Prediction by partial matching) compression algorithm variation H and I.2. It provide an API similar to Python's zlib/bz2/lzma modules.

https://pyppmd.readthedocs.io/en/latest/

GNU Lesser General Public License v2.1

8 stars 3 forks source link

Better license #5

Closed miurahr closed 3 years ago

miurahr commented 3 years ago

Describe the bug There are mixture of licenses, Public Domain or LGPLv2+ (c code from p7zip, that derivative from 7-zip) and BSD-3.

It is better to change to LGPLv2+ that is clean.

miurahr commented 3 years ago

Only compatible license is LGPLv2+. so I've changed to it.

cielavenir commented 3 years ago

@miurahr

Ppmd7 code can be obtained from LZMA SDK https://www.7-zip.org/sdk.html which is public domain
Ppmd8 code is a part of 7-zip, but the header says public domain. Also, explicit permission has been issued in https://sourceforge.net/p/sevenzip/discussion/45797/thread/8de79baf/ .

I suppose it is safe to license pyppmd under BSD License.

cielavenir commented 3 years ago

@miurahr May I have your opinion?

miurahr commented 3 years ago

There is no problem.

cielavenir commented 3 years ago

sure (when I find more "liberal" source (here I mean LZMA SDK for example) I tend to switch to it, but it is all up to you)