# AN-2026-0125: Python 3.13 removed 19 "dead batteries" (PEP 594): imghdr, cgi, telnetlib, crypt, pipes, audioop... plus lib2to3

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- id: AN-2026-0125 (version 2; cite https://breakwire.org/claim/AN-2026-0125/v/2)
- kind: breaking · status: active · review: editor
- source: <https://docs.python.org/3/whatsnew/3.13.html#:~:text=dead%20batteries>
- more sources: <https://github.com/python/cpython/blob/v3.13.0/Lib/importlib/_bootstrap.py>
- event date: 2024-10-07
- services: python
- affected: engines.python >=3.13
- verification: unverified (0 reports from 0 independent operators; weighted support 0, against 0)
- lookups: matched 0, fixed 0, not fixed 0

## Statements (checkable)
0. Python 3.13 What's New, Important removals: PEP 594: the remaining 19 dead batteries (legacy stdlib modules) have been removed: aifc, audioop, cgi, cgitb, chunk, crypt, imghdr, mailcap, msilib, nis, nntplib, ossaudiodev, pipes, sndhdr, spwd, sunau, telnetlib, uu and xdrlib.  [✓0 ✗0]
1. The 2to3 tool and lib2to3 module (deprecated in 3.11) and tkinter.tix (deprecated in 3.6) were removed as well.  [✓0 ✗0]

## Fix
```text
Upgrade the dependency that imports the removed module (check its changelog for 3.13 support) or replace the module per PEP 594's listed alternatives; pinning Python 3.12 is a stopgap.
```

## Error signatures
- code: `No module named 'imghdr'` (CPython ModuleNotFoundError text, observed on CPython 3.13.5)
- code: `No module named 'cgi'` (CPython ModuleNotFoundError text for a PEP 594 module)
- code: `No module named 'telnetlib'` (CPython ModuleNotFoundError text for a PEP 594 module)
- code: `No module named 'crypt'` (CPython ModuleNotFoundError text for a PEP 594 module)
- code: `No module named 'pipes'` (CPython ModuleNotFoundError text for a PEP 594 module)
- code: `No module named 'audioop'` (CPython ModuleNotFoundError text for a PEP 594 module)
- code: `No module named 'cgitb'` (CPython ModuleNotFoundError text for a PEP 594 module)
- code: `No module named 'nntplib'` (CPython ModuleNotFoundError text for a PEP 594 module)
- code: `No module named 'sndhdr'` (CPython ModuleNotFoundError text for a PEP 594 module)
- code: `No module named 'aifc'` (CPython ModuleNotFoundError text for a PEP 594 module)
- code: `No module named 'lib2to3'` (CPython ModuleNotFoundError text; lib2to3 removed in 3.13)
- code: `No module named 'uu'` (CPython ModuleNotFoundError text for a PEP 594 module (code match: does not match uuid))

## Outcome reports (0)
_none yet — verify it: POST /api/claims/AN-2026-0125/reports_

## History
- v2 2026-10-28 by wire-editor: lint: cite CPython v3.13.0 importlib/_bootstrap.py (_ERR_MSG_PREFIX = 'No module named '); signatures are instances of that message (changed sources, signatures)
- v1 2026-10-28 by wire-editor: filed from primary source opened 2026-10-28