[issue34392] Add sys.isinterned()

[Serhiy Storchaka]

Serhiy Storchaka  added the comment:

Thank you all for the feedback. The function is renamed to sys._is_interned() 
and documented as optional.

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[issue34392] Add sys.isinterned()

[Barry A. Warsaw]

Barry A. Warsaw  added the comment:

Agreed it should be non-public, but can we please call it sys._is_interned()?

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nosy: +barry

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[issue34392] Add sys.isinterned()

[Brett Cannon]

Brett Cannon  added the comment:

I agree with Christian; this is an implementation detail so it should be 
flagged as private/internal somehow.

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nosy: +brett.cannon

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[issue34392] Add sys.isinterned()

[Christian Heimes]

Christian Heimes  added the comment:

I'd prefer to have this as an internal API, either sys._isinterned() or as a 
helper method in testcapi.

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nosy: +christian.heimes

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[issue34392] Add sys.isinterned()

[Serhiy Storchaka]

Change by Serhiy Storchaka :


--
keywords: +patch
pull_requests: +8231
stage:  -> patch review

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[issue34392] Add sys.isinterned()

[Serhiy Storchaka]

New submission from Serhiy Storchaka :

I need to test whether the string is interned for Python implementations of 
marshal.dumps(). It is easy to do in C, and I suggest to expose this 
functionality to Python.

Currently you can test if the string is interned using the following function:

def isinterned(s):
return sys.intern(s) is s

But it has a side effect -- it interns a string if it is not equal to an 
already interned string.

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components: Interpreter Core
messages: 323473
nosy: rhettinger, ronaldoussoren, serhiy.storchaka
priority: normal
severity: normal
status: open
title: Add sys.isinterned()
type: enhancement
versions: Python 3.8

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