[New-bugs-announce] [issue43101] Add deprecation of float limits for resource to documentation

Gereon Kremer report at bugs.python.org
Tue Feb 2 07:52:41 EST 2021

New submission from Gereon Kremer <gereon.kremer at gmail.com>:

While the documentation always (as in: at least since 3.5) required to pass "a tuple (soft, hard) of two integers" to resource.setrlimit(), passing floats worked just fine until 3.9.
This behavior was deprecated in 3.8 and removed in 3.10.

I see that the implementation was merely fixed to do what the documentation says. Nevertheless, I think this change of behavior should be mentioned in the documentation.

In my use-case for resource (within preexec_fn of subprocess.Popen), this deprecation warning only showed up in 3.9 for some reason (as you can see here: https://github.com/nafur/python-playground/runs/1814573503) and is now hidden by a generic "subprocess.SubprocessError: Exception occurred in preexec_fn." message.
A hint in the documentation would have helped significantly...

messages: 386139
nosy: nafur
priority: normal
severity: normal
status: open
title: Add deprecation of float limits for resource to documentation
versions: Python 3.10, Python 3.8, Python 3.9

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