The New REPL Command History Does Not Honor Partial Text

[ericsnowcurrently]

Bug report

Bug description:

Let's say I fire up the REPL and start with the following:

>>> spam = 1
>>> ham = 2
>>> eggs = 3
>>> sp

At that point, I can up-arrow to scroll through my REPL command history. Normally with that partial sp on the line, hitting up-arrow once will immediately present spam = 1. Hitting it again will do nothing (since there are no more matching lines).

With the new REPL, it presents eggs = 3. Hitting it again will present ham = 2, and again it presents spam = 1. I'd rather it keep doing what it did before.

CC @ambv, @pablogsal

CPython versions tested on:

CPython main branch

Operating systems tested on:

Linux

Linked PRs

• gh-120767: Add REPL history navigation with partial text #121859

[cfbolz]

this is not the default behaviour of readline everywhere, I think. I have the same behaviour, but only because I put the following lines into my .inputrc:

"\e[A": history-search-backward
"\e[B": history-search-forward

[ericsnowcurrently]

Good point. I have the same in my .inputrc. I suppose the operative word there is "search" (rather than "traverse").

Perhaps this issue might be as much a feature request as a bug, e.g. "make the new REPL match readline behavior in this one way". In the end I reported it as a bug because, from a user standpoint, the behavior I was used to went away.

[lilydjwg]

I have other things in my .inputrc and it's not available in new repl too:

set show-all-if-unmodified on
set colored-completion-prefix On

[ambv]

There are no plans to replicate all .inputrc options in the new REPL. You can use the basic REPL if you rely on specific .inputrc customizations.

[A4-Tacks]

There are no plans to replicate all .inputrc options in the new REPL. You can use the basic REPL if you rely on specific .inputrc customizations.

May I ask how to use basic REPL? on my terminal

Ok PYTHON_BASIC_REPL=1 python