gh-130472: Integrate fancycompleter with the new repl, to get colored tab completions#130473

Merged

pablogsal merged 49 commits intopython:mainfrom

antocuni:antocuni/fancycompleter

Apr 5, 2026

Commits on Apr 5, 2026

import fancycompleter from https://github.com/pdbpp/fancycompleter/commit/67e3ec128cf8d44be6e48e775234c07f4b23064e

antocuni
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add copyright notice

antocuni
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enable FancyCompleter by default, unless you set PYTHON_BASIC_COMPLETER

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WIP: kill a lot of code which is no longer necessary

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force colors for now

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kill the logic to find a readline, we can always use _pyrepl.readline now

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kill LazyVersion

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we surely don't need to support python 2.7 now :)

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kill ConfigurableClass

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better name

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use _colorize instead of our own Color

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WIP: copy&adapt some tests from the original fancycompleter. They don't work because they need to be ported from pytest to unittest

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edited by copilot: move from pytest-style to unittest-style

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don't try to be too clever with exceptions: if a global name raises an exception when evaluated, just color it as None

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no longer needed

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this doesn't test anything meaningful

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fix this test

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fix this test

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Fix this test

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Apply hugovk suggestions from code review

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Apply suggestions from code review

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Apply suggestions from code review

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remove unneeded lazy import

antocuni
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Update Lib/_pyrepl/fancycompleter.py

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move import to module scope

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move import

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kill this for now, we can redintroduce it later if/when we enable fancycompleter+pdb

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this link is dead, add a comment to explain what it does instead

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fix precommit

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we need to make this import lazy, else we get circular imports

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now that we have themes, we can kill the config object

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style

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📜🤖 Added by blurb_it.

blurb-it[bot]
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fix mypy

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document PYTHON_BASIC_COMPLETER

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try to manually fix the filename

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Typo

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reword

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force PYTHON_COLORS=1 for tests which expects to see colors. Hopefully this fixes the failures on Android CI

antocuni
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fix it in a different way: just look in the theme to find the expected color. This is both more robust and more correct

antocuni
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fix precommit

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Update Lib/_pyrepl/fancycompleter.py

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put _colorize.FancyCompleter in alphabetical order w.r.t. the other sections

antocuni
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get_theme() is relatively expensive, fetch it early and cache it

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base is never used when calling commonprefix, remove it

antocuni
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Update Lib/_pyrepl/fancycompleter.py

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there is no need to sort words in advance, we can just sort names later

antocuni
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undo 6a5bcfe9ed: there IS actually a good reason to sort the words in advance, let's add a comment to explain why

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gh-130472: Fix pyrepl fancycompleter edge cases
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