python / python/cpython

Built-in function `range` params discrepancy across versions

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3.12 3.13 3.14 docs
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描述

I'm sorry if this has already been reported. I'm sure it's very low on any list of priorities but it should be an easy one.

I noticed that when doing a Google search for "python built in functions" I am presented with two official results:

  1. functions https://docs.python.org/3/library/functions.html
  2. stdtypes https://docs.python.org/3/library/stdtypes.html

On the functions page, clicking on range takes you to https://docs.python.org/3/library/functions.html#func-range . It looks like, as of 3.11, range accepts step as a kwarg. This is inconsistent with the stdtypes page which shows step as an optional, positional arg through 3.13.

functions:

stdtypes:

source:

I didn't see any mention of this change in What’s New In Python 3.11 and it surprised me that a built-in would be changed in such a way.

I pulled a 3.11 docker image and it would seem step is not a kwarg.

docker run -it --rm python:3.11
Python 3.11.10 (main, Oct 19 2024, 04:02:01) [GCC 12.2.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> range(1, 1, step=1)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: range() takes no keyword arguments

tl;dr - The functions page incorrectly states that the range function accepts step as a kwarg.

Linked PRs
  • gh-125945
  • gh-137652
  • gh-137653

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  4. 提交 Pull Request,并在描述里引用这个 Issue 编号。

调研方向

比较 3.10 至 3.13 版本的 functionsstdtypes 文档页面中的 range 条目,使用链接的 rangeobject.c 源码验证调用行为。审阅链接的 PR gh-125945、gh-137652 和 gh-137653;当文档不再声称 step 可作为关键字参数接受时,工作即完成。

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