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PEP 787: defer pending PyPI library experimentation #4389

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AA-Turner merged 2 commits into from
Apr 27, 2025
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PEP 787: defer pending PyPI library experimentation #4389

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PEP 787: defer pending PyPI library experimentation
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14 changes: 13 additions & 1 deletion peps/pep-0787.rst
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Expand Up @@ -2,7 +2,7 @@ PEP: 787
Title: Safer subprocess usage using t-strings
Author: Nick Humrich <nick@humrich.us>, Alyssa Coghlan <ncoghlan@gmail.com>
Discussions-To: https://discuss.python.org/t/pep-787-safer-subprocess-usage-using-t-strings/88311
Status: Draft
Status: Deferred
Type: Standards Track
Requires: 750
Created: 13-Apr-2025
Expand All @@ -18,6 +18,18 @@ proposes extending the :mod:`subprocess` and :mod:`shlex` modules to natively su
safer and more ergonomic shell command execution with interpolated values, as well as
serving as a reference implementation for the t-string feature to improve API ergonomics.

PEP Deferral
============

During the discussions of the initial draft of the PEP, it became clear that t-strings provide
a potential opportunity to offer ``shell=True`` levels of syntactic convenience for complex
subprocess invocations without all of the security and cross-platform compatibility concerns
that arise with giving user provided text access to a full system shell.

To that end, the PEP authors now plan to work on an experimental :pypi:`t-string
based subprocess invocation library <tstrprocess>` through the Python 3.14 beta
period (and beyond), before preparing a revised draft of the proposal for Python 3.15.

Motivation
==========

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