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GeezerVison is showing github.com — gh-148675: Reuse typecodes for array.array() error message by vstinner · Pull Request #149779 · python/cpython

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@vstinner

@vstinner vstinner commented May 13, 2026 •
edited by bedevere-app Bot
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array.array() error message now reuses array.typecodes, instead of maintaining an hardcoded list of valid type codes.

  • Issue: Add support for numpy buffer format Zf and Zd #148675

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@vstinner
pythongh-148675: Reuse typecodes for array.array() error message
5c4379c 
array.array() error message now reuses array.typecodes, instead of
maintaining an hardcoded list of valid type codes.
@vstinner vstinner added the skip news label May 13, 2026
@bedevere-app bedevere-app Bot mentioned this pull request May 13, 2026
Add support for numpy buffer format Zf and Zd #148675
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@bedevere-app bedevere-app Bot added the awaiting core review label May 13, 2026
@vstinner

vstinner commented May 13, 2026

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Example:

import array
array.array('v')

Output:

Traceback (most recent call last):
  File "/home/vstinner/python/main/x.py", line 2, in <module>
    array.array('v')
    ~~~~~~~~~~~^^^^^
ValueError: bad typecode (must be: b, B, u, w, h, H, i, I, l, L, q, Q, e, f, d, Zf, Zd)
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skirpichev
skirpichev approved these changes May 14, 2026
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@vstinner
vstinner merged commit a8ef467 into python:main May 15, 2026
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@vstinner
vstinner deleted the array_errmsg branch May 15, 2026 11:22
@bedevere-app bedevere-app Bot removed the awaiting core review label May 15, 2026
@vstinner

vstinner commented May 15, 2026

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Merged, thanks for the review.

I wrote this change since recently, I noticed that 3 type codes were missing from this error message. I fixed the error message, but with this change it's no longer neeeded (it's always up to date).
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@skirpichev skirpichev skirpichev approved these changes

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@vstinner @skirpichev
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