Hacktoberfest 2026: the issues maintainers tagged for October, open and beginner-friendly. Browse Hacktoberfest issues

Not registered format raises FormatterNotFoundError

Open
#515 0 comments 0 reactions 0 assignees View on GitHub

Nobody has claimed this yet.

Assessment

Difficulty
3/5
Estimated time
1-2 days
Newbie friendliness
45/100
Issue type
Bug
Clarity
Mostly clear
Activity status
Stale
Tech stack
python
Domain
api

Research direction

Start by reproducing unmarshalling with a non-standard, unregistered format and trace where FormatterNotFoundError is raised. The issue is done when that format is ignored during unmarshalling without raising the error.

Written by the indexing model from the issue text.

Description

area/unmarshalling kind/bug/confirmed

Non-standard format (not registered as a format check in validator) raises error on unmarshalling process. It should ignore the format.

Dominant language
Python
Stars
368
Forks
140
PR merge metrics
No merged PRs in 30d

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

More from python-openapi/openapi-core

All issues in python-openapi/openapi-core

Similar issues

More Python issues

Get new issues in your inbox

A short digest of beginner-friendly GitHub issues.