[New-bugs-announce] [issue25663] Make rlcompleter avoid duplicate global names

[Martin Panter]

New submission from Martin Panter:

When playing with the Editline alternative to Readline, I noticed that “global” name completions can include duplicates:

>>> No
None                 NotADirectoryError(  NotImplementedError(
None                 NotImplemented      
>>> None
None None

It completed my line to “None”, but if you hit Tab again, it lists two duplicate options both identical to what I already have. The reason is that “None” is both a reserved keyword, and a member of the builtins module.

My patch avoids adding extra completions if a name has already been added. It also prioritizes the global namespace over builtins, so that say if you alias “int” to a non-callable, it is no longer listed with an opening bracket “(” suffix. Earlier behaviour:

>>> int = 81
>>> in
in     input( int    int(  

Now:

>>> in
in     input( int

----------
components: Library (Lib)
files: global-dupes.patch
keywords: patch
messages: 254873
nosy: martin.panter
priority: normal
severity: normal
stage: patch review
status: open
title: Make rlcompleter avoid duplicate global names
type: behavior
versions: Python 2.7, Python 3.4, Python 3.5, Python 3.6
Added file: http://bugs.python.org/file41071/global-dupes.patch

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue25663>
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