Description

ShaharNaveh

opened on Apr 25, 2026

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Code in question:

cpython/Include/ceval.h

Line 129 in c650b51

#define FVC_NONE 0x0

This confused me about the possible oparg values for CONVERT_VALUE.

#6132 Added FORMAT_SIMPLE that's what that value used to be for.

Even the docs don't specify a possible value of "0" as an oparg:

cpython/Doc/library/dis.rst

Lines 1719 to 1723 in c650b51

	* ``oparg == 1``: call :func:`str` on *value*
	* ``oparg == 2``: call :func:`repr` on *value*
	* ``oparg == 3``: call :func:`ascii` on *value*

Linked PRs

• gh-148986: Remove unused FVC_NONE definition #148996

Activity

1. picnixz commented on Apr 25, 2026

   

   picnixz

   on Apr 25, 2026

   Member

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   Sorry but this cannot be removed,. it's part of public headers. You don't know how it's used in the wild. It doesn't hurt IMO.
2. picnixz

   closed this as not plannedon Apr 25, 2026
3. ShaharNaveh commented on Apr 25, 2026

   

   ShaharNaveh

   on Apr 25, 2026

   ContributorAuthor

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   Sorry but this cannot be removed,. it's part of public headers. You don't know how it's used in the wild. It doesn't hurt IMO.

   Good point!
   thanks for the feedback:)

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