Description

assignee = None
closed_at = None
created_at = <Date 2017-08-03.22:32:22.945>
labels = ['type-feature', 'library', '3.9']
title = 'base85 z85 variant encoding'
updated_at = <Date 2022-01-14.10:46:27.835>
user = 'https://bugs.python.org/underrun'

activity = <Date 2022-01-14.10:46:27.835>
actor = 'matan1008'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['Library (Lib)']
creation = <Date 2017-08-03.22:32:22.945>
creator = 'underrun'
dependencies = []
files = []
hgrepos = []
issue_num = 31116
keywords = ['patch']
message_count = 3.0
messages = ['299724', '361991', '362026']
nosy_count = 4.0
nosy_names = ['pitrou', 'underrun', 'Dobatymo', 'matan1008']
pr_nums = ['30598']
priority = 'normal'
resolution = None
stage = 'patch review'
status = 'open'
superseder = None
type = 'enhancement'
url = 'https://bugs.python.org/issue31116'
versions = ['Python 3.9']

Activity

1. underrun commented on Aug 3, 2017

   

   underrunmannequin

   on Aug 3, 2017

   MannequinAuthor

   More actions

   Issue bpo-17618 introduced base85 options into the base64 module including b85 and a85/adobe variants.

   There has since been introduced a variant that is easier to work with specifically as it avoids " ' \ characters which avoids quoting/escaping issues when working with base85 literals in python, json, xml, etc.

   https://rfc.zeromq.org/spec:32/Z85/

   there is a reference implementation in c for which an extension could easily be built.

   alternately it would be very easy to add a _z85alphabet etc. to the base64 module to mirror what has been done with a/b85.

   1. is there any interest in this being in the language
   2. if so do we want python impl or c extension around ref impl?
2. underrun

   added

   3.7 (EOL)end of lifeend of life

   stdlibStandard Library Python modules in the Lib/ directoryStandard Library Python modules in the Lib/ directory

   type-featureA feature request or enhancementA feature request or enhancement

   on Aug 3, 2017
3. Dobatymo commented on Feb 14, 2020

   

   Dobatymomannequin

   on Feb 14, 2020

   Mannequin

   More actions

   base64.b85encode does not use ", ' or \ as well.

   That's the _b85alphabet

   _b85alphabet = (b"0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"
                   b"abcdefghijklmnopqrstuvwxyz!#$%&()*+-;<=>?@^_`{|}~")
4. underrun commented on Feb 15, 2020

   

   underrunmannequin

   on Feb 15, 2020

   MannequinAuthor

   More actions

   z85 avoids all of:

   ` \ " ' _ , ;

   Backtick and semicolon increase the number of places that z85 can be used
   without issue over b85. All of these might not be as big an issue in python
   as in other tools/languages but interoperability would still be improved
   through the addition of z85.

   • Derek

   On Fri, Feb 14, 2020, 09:18 Dobatymo <[email protected]> wrote:

   Dobatymo <[email protected]> added the comment:

   base64.b85encode does not use ", ' or \ as well.

   That's the _b85alphabet

   _b85alphabet = (b"0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"
   b"abcdefghijklmnopqrstuvwxyz!#$%&()*+-;<=>?@^_`{|}~")

   ----------
   nosy: +Dobatymo

   ---

   Python tracker <[email protected]>
   <https://bugs.python.org/issue31116\>

   ---
5. SilentGhost

   added

   3.9 (EOL)end of lifeend of life

   and removed

   3.7 (EOL)end of lifeend of life

   on Feb 15, 2020
6. ezio-melotti

   transferred this issue fromon Apr 10, 2022
7. serhiy-storchaka

   closed this as completedon Feb 25, 2024

Issue actions