httpx 0.12.0 PyPI wheel contains both public- and

The Fix

Upgrade to version 0.13.0 or later.

Based on closed encode/httpx issue #864 · PR/commit linked

Production note: This usually shows up under retries/timeouts. Treat it as a side-effect risk until you can verify behavior with a canary + real traffic.

Jump to Verify Open PR/Commit

@@ -4,6 +4,12 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 
+## 0.12.1 (March 19th, 2020)
+
+### Fixed

repro.py

In [1]: import httpx 
   ...: from httpx.exceptions import InvalidURL                                                                                                                             

In [2]: try: 
   ...:     httpx.get("foo.bar") 
   ...: except InvalidURL: 
   ...:     pass 
   ...:

verify

Re-run the minimal reproduction on your broken version, then apply the fix and re-run.

fix.md

Option A — Upgrade to fixed release\nUpgrade to version 0.13.0 or later.\nWhen NOT to use: This fix should not be used if the application relies on the old module structure.\n\n

Why This Fix Works in Production

Trigger: ...: from httpx.exceptions import InvalidURL
Mechanism: Resolves a packaging issue in version 0.12.0 where additional files were being included.
Why the fix works: Resolves a packaging issue in version 0.12.0 where additional files were being included. (first fixed release: 0.13.0).

Production impact:

If left unfixed, the same config can fail only in production (env differences), causing startup failures or partial feature outages.

Why This Breaks in Prod

Shows up under Python 3.7 in real deployments (not just unit tests).
Production symptom (often without a traceback): ...: from httpx.exceptions import InvalidURL

Proof / Evidence

GitHub issue: #864
Fix PR: https://github.com/encode/httpx/pull/868
First fixed release: 0.13.0
Reproduced locally: No (not executed)
Last verified: 2026-02-09
Confidence: 0.85
Did this fix it?: Yes (upstream fix exists)
Own content ratio: 0.67

Discussion

High-signal excerpts from the issue thread (symptoms, repros, edge-cases).

Jump to Sources Open on GitHub

“Okay doke, let roll a re-release due to packaging issues.”

@lovelydinosaur · 2020-03-16 · source

“To extract a working code sample from florimondmanca's prose, this should work: As should this, though less recommended:”

@StephenBrown2 · 2020-03-13 · source

“I'll close for now, but if you keep encountering issues if switching to httpx.<...> then feel free to report. :-) Thanks!”

@florimondmanca · 2020-03-13 · source

“Thanks for the quick response”

@kbakk · 2020-03-13 · source

Failure Signature (Search String)

...: from httpx.exceptions import InvalidURL
In 0.12.0 the exception isn't caught:

Copy-friendly signature

signature.txt

Failure Signature
-----------------
...: from httpx.exceptions import InvalidURL
In 0.12.0 the exception isn't caught:

Error Message

Signature-only (no traceback captured)

error.txt

Error Message
-------------
...: from httpx.exceptions import InvalidURL
In 0.12.0 the exception isn't caught:

Minimal Reproduction

repro.py

In [1]: import httpx 
   ...: from httpx.exceptions import InvalidURL                                                                                                                             

In [2]: try: 
   ...:     httpx.get("foo.bar") 
   ...: except InvalidURL: 
   ...:     pass 
   ...:

Environment

Python: 3.7
httpx: 0.11.1

What Broke

Users experienced uncaught exceptions when using the InvalidURL exception class.

Fix Options (Details)

Option A — Upgrade to fixed release Safe default (recommended)

Upgrade to version 0.13.0 or later.

When NOT to use: This fix should not be used if the application relies on the old module structure.

Use when you can deploy the upstream fix. It is usually lower-risk than long-lived workarounds.

Fix reference: https://github.com/encode/httpx/pull/868

First fixed release: 0.13.0

Last verified: 2026-02-09. Validate in your environment.

When NOT to Use This Fix

This fix should not be used if the application relies on the old module structure.

Verify Fix

verify

Re-run the minimal reproduction on your broken version, then apply the fix and re-run.

Did This Fix Work in Your Case?

Quick signal helps us prioritize which fixes to verify and improve.

Prevention

Add a CI check that diffs key outputs after upgrades (OpenAPI schema snapshots, JSON payload shapes, CLI output).
Upgrade behind a canary and run integration tests against the canary before 100% rollout.
Make timeouts explicit and test them (unit + integration) to avoid silent behavior changes.
Instrument retries (attempt count + reason) and alert on spikes to catch dependency slowdowns.

Version Compatibility Table

Version	Status
0.13.0	Fixed

Related Issues

No related fixes found.

Cluster: httpx:configuration-error All hubs All clusters

Related clusters: Data consistency Other Timeout

Sources

We don’t republish the full GitHub discussion text. Use the links above for context.

httpx 0.12.0 PyPI wheel contains both public- and private-name modules (Fix)