[Bernardoow]

This PR updates the Python Flask server generator to support Python 3.11–3.14 for both Connexion 2 and Connexion 3.

Changes include:

• Update supported Python versions to 3.11–3.15.
• Update Connexion 2 dependency constraints to >=2.3.3,<3.0.0.
• Maintain Connexion 3 dependency constraints at >=2.3.3,<4.0.0.
• Update Flask and related dependency constraints.
• Align requirements.txt and setup.py configurations.
• Remove obsolete Python version compatibility code.
• Preserve existing legacy testing options, including Nose and Flask-Testing.

Closes #25375

PR checklist

• Read the contribution guidelines.

• Run the following to build the project and update samples:

  ./mvnw clean package || exit
  ./bin/generate-samples.sh ./bin/configs/*.yaml || exit
  ./bin/utils/export_docs_generators.sh || exit
  

  (For Windows users, please run the script in WSL

  Commit all changed files.

  This is important, as CI jobs will verify all generator outputs of your HEAD commit as it would merge with master.

  These must match the expectations made by your contribution.

  You may regenerate an individual generator by passing the relevant config(s) as an argument to the script, for example ./bin/generate-samples.sh bin/configs/java*.

  IMPORTANT: Do not purge/delete any folders/files (e.g. tests) when regenerating the samples as manually written tests may be removed.

• If your PR is targeting a particular programming language, @mention the technical committee members, so they are more likely to review the pull request.

---

Summary by cubic

Removes support for end-of-life Python versions in the Python Flask server generator, now supporting Python 3.11–3.15.

Migration

• Generated servers now require Python >=3.11,<3.15; Python 3.10 and below are no longer supported.
• Connexion 2 output pins connexion[swagger-ui]>=2.15.1,<3.0.0 with Flask 2.x, while Connexion 3 keeps connexion[flask,swagger-ui,uvicorn]>=3.3.0,<4.0.0 with Flask <4.0.0.
• Drops CI coverage for Python 3.2–3.10 and removes pre-3.7 typing compatibility branches in typing_utils.py.
• Relaxes the pytest constraint to >=7.1.0,<10.0.0 and regenerates the Python Flask petstore samples.

Closes #25375.

^{Written for commit 2813cbe. Summary will update on new commits.}

[Bernardoow]

If your PR is targeting a particular programming language, @mention the technical committee members, so they are more likely to review the pull request.

@cbornet (2017/09) @tomplus (2018/10) @krjakbrjak (2023/02) @fa0311 (2023/10)

[cubic-dev-ai]

2 issues found across 18 files

Prompt for AI agents (unresolved issues)

Check if these issues are valid — if so, understand the root cause of each and fix them. When an issue isn't valid or won't be fixed in this PR, reply in its thread with the reason and then resolve the thread. If appropriate, use sub-agents to investigate and fix each issue separately.


<file name="modules/openapi-generator/src/main/resources/python-flask/travis.mustache">

<violation number="1" location="modules/openapi-generator/src/main/resources/python-flask/travis.mustache:8">
P2: This matrix adds Python 3.15 even though generated `setup.py` explicitly rejects Python 3.15 (`python_requires=">=3.11,<3.15"`). Remove this entry or raise the package support constraint and dependency support together before testing 3.15.</violation>
</file>

<file name="samples/server/petstore/python-flask/.travis.yml">

<violation number="1" location="samples/server/petstore/python-flask/.travis.yml:8">
P2: This adds Python 3.15 to the CI matrix even though the sample declares `python_requires=">=3.11,<3.15"` and the stated support range ends at 3.14. Remove this entry, or update the package support constraints only after 3.15 is intentionally supported.</violation>
</file>

<sub>Reply with feedback, questions, or to request a fix.

View guided diff | Re-trigger cubic</sub>

[cubic-dev-ai]

P2: This matrix adds Python 3.15 even though generated setup.py explicitly rejects Python 3.15 (python_requires=">=3.11,<3.15"). Remove this entry or raise the package support constraint and dependency support together before testing 3.15.

Prompt for AI agents

Check if this issue is valid — if so, understand the root cause and fix it. When an issue isn't valid or won't be fixed in this PR, reply in its thread with the reason and then resolve the thread. At modules/openapi-generator/src/main/resources/python-flask/travis.mustache, line 8:

<comment>This matrix adds Python 3.15 even though generated `setup.py` explicitly rejects Python 3.15 (`python_requires=">=3.11,<3.15"`). Remove this entry or raise the package support constraint and dependency support together before testing 3.15.</comment>

<file context>
@@ -1,21 +1,12 @@
-{{/useConnexion3}}
+  - "3.13"
+  - "3.14"
+  - "3.15"
+
 # command to install dependencies
</file context>

[Bernardoow]

The connexion3 was update to be compatible with 3.15 but not yet release.. I can wait for this !!

spec-first/connexion@3216244

[Bernardoow]

Working on Cubit points - 2026-10-24

[cubic-dev-ai]

All reported issues were addressed across 9 files (changes from recent commits).

<sub>Reply with feedback, questions, or to request a fix.

View guided diff | Re-trigger cubic</sub>

[cubic-dev-ai]

All reported issues were addressed across 10 files (changes from recent commits).

<sub>Requires human review: Auto-approval blocked because this review re-detected 1 unresolved issue already reported by Cubic.

View guided diff | Re-trigger cubic</sub>