The New REPL Command History Does Not Honor Partial Text

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-121859

首先，在 Linux 上的 CPython main-branch REPL 中，使用报告里的 sp 示例重现部分输入时的历史记录行为。将按向上箭头得到的结果与预期的按前缀过滤历史记录的行为进行比较；当只显示匹配的历史记录条目并跳过不相关的条目时，问题即得到解决。