Standard library removal
Python 3.13 telnetlib removed PEP 594 telnetlib documentation
A network automation fallback path fails to import.
Agent Quick Fix
Repair against the current Python 3.13 / telnetlib contract, then keep the change narrow and source-backed.
Product: Python 3.13 / telnetlib
Current-contract area: Removed stdlib module `telnetlib` reached through an integration path
Likely root cause: A network automation fallback path fails to import.
Repair direction: Verifier checks the maintained replacement package/API and behavior, including edge cases. Verify functional parity on representative inputs, not only a replacement import.Symptom
A network automation fallback path fails to import.
Why This Happens
The import is locally valid for older runtimes and may have no project dependency declaration; only the target runtime's current stdlib contents resolve it.
Common Wrong Fixes
- Changing local code without checking the current external contract.
- Retrying the same install, build, or API call with no version/source change.
- Applying a broad unsafe bypass when a narrow compatibility fix is available.
Codex Search Keywords
These are the search terms observed in a neutral Codex validation run for this failure shape.
Python 3.13 telnetlib removed PEP 594 telnetlib documentation
site:docs.python.org telnetlib Python 3.13 removed
https://peps.python.org/pep-0594/