[New-bugs-announce] [issue17618] base85 encoding

[Antoine Pitrou]

New submission from Antoine Pitrou:

Base85 encoding (see e.g. http://en.wikipedia.org/wiki/Ascii85 ) allows a tighter encoding than Base64: it has a 5/4 expansion ratio, rather than 4/3.
It is used in Mercurial, git, and there's another variant that's used by Adobe in the PDF format.

It would be nice to have a Base85 implementation in either the binascii or base64 modules.

(unfortunately the Mercurial implementation is GPL'ed, although if we want to copy it we might simply ask them for a relicensing)

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components: Library (Lib)
messages: 185835
nosy: christian.heimes, pitrou
priority: normal
severity: normal
status: open
title: base85 encoding
type: enhancement
versions: Python 3.4

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue17618>
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