python-jsonschema/jsonschema

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An implementation of the JSON Schema specification for Python

Stars: 5k
Forks: 671
Open beginner issues: 0
Indexed issues: 48
Avg merge: 1d 1h
Merged PRs (30d): 10

Dominant language: Python
License: MIT
Last GitHub push: Sep 15, 2026
Latest indexed: Sep 19, 2026
Contributing guide: Contributing guide
Code of conduct: No code of conduct
Beginner labels: help wanted

Beginner friendly Everything

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48 open issues indexed

regex format checker crashes with ValueError on conflicting inline flags Open

Difficulty 3/5 1-2 days Newbie friendliness 68/100

python-jsonschema/jsonschema#1558 · 2 comments · Opened Aug 19, 2026
Feature request: allow a reference registry to have a fixed base_uri when the schema does not set `"$id"` Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

python-jsonschema/jsonschema#1547 · Opened Aug 9, 2026
regex format checker crashes with RecursionError on deeply nested patterns Open

Difficulty 2/5 1-3 hours Newbie friendliness 78/100

python-jsonschema/jsonschema#1538 · Opened Aug 1, 2026
unevaluatedItems and unevaluatedProperties are quadratic in instance size Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

python-jsonschema/jsonschema#1536 · 1 comment · Opened Jul 30, 2026
Draft 2020-12 relative JSON Pointer index manipulation is rejected Open

Needs Simplification

Difficulty 3/5 1-2 days Newbie friendliness 75/100

python-jsonschema/jsonschema#1533 · Opened Jul 25, 2026
is_duration raises an uncaught decimal.Overflow on a duration with a large exponent Open

Needs Test Upstream

Difficulty 2/5 1-3 hours Newbie friendliness 78/100

python-jsonschema/jsonschema#1511 · 1 comment · Opened Jul 10, 2026
$dynamicRef doesn't find $dynamicAnchor overrides in root schemas without $id Open

Difficulty 4/5 3-5 days Newbie friendliness 55/100

python-jsonschema/jsonschema#1497 · 1 comment · Opened Jun 12, 2026
multiple checker functions for a given format Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

python-jsonschema/jsonschema#1496 · Opened Jun 12, 2026
RFC3339 year 0000 rejected by date-time format validation Open

Needs Test Upstream

Difficulty 4/5 3-5 days Newbie friendliness 48/100

python-jsonschema/jsonschema#1465 · 2 comments · Opened Mar 15, 2026
Validation fails with multi-file schemas with relative file names Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

python-jsonschema/jsonschema#1454 · Opened Feb 12, 2026
`Validator`s pubilc API Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

python-jsonschema/jsonschema#1422 · Opened Oct 13, 2025
Add more context to the non-unique array item in error Open

Error Reporting

Difficulty 3/5 1-2 days Newbie friendliness 42/100

python-jsonschema/jsonschema#1363 · 1 comment · Opened Jun 2, 2025
Incorrect validation of valid payload with valid schema Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

python-jsonschema/jsonschema#1362 · 2 comments · Opened May 29, 2025
Validator protocol type checking issues Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

python-jsonschema/jsonschema#1358 · 4 comments · Opened May 10, 2025
enabling format-assertion via adding vocabulary to a new meta-schema (dialect?) Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

python-jsonschema/jsonschema#1355 · 7 comments · 2 reactions · Opened May 2, 2025
Question about validators across $refs Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

python-jsonschema/jsonschema#1341 · Opened Apr 3, 2025
Mutating validators are difficult to debug Open

Dialects v2

Difficulty 5/5 Over a week Newbie friendliness 25/100

python-jsonschema/jsonschema#1338 · 1 comment · Opened Mar 5, 2025
Performance degradation moving from Python 3.10 to 3.12 Open

Difficulty 4/5 3-5 days Newbie friendliness 48/100

python-jsonschema/jsonschema#1304 · 4 comments · Opened Oct 1, 2024
Status of type annotations Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

python-jsonschema/jsonschema#1298 · 2 comments · Opened Sep 9, 2024
Support hiding annotation keywords when reporting errors Open

Dialects v2 Error Reporting

Difficulty 5/5 Over a week Newbie friendliness 35/100

python-jsonschema/jsonschema#1271 · Opened Jun 17, 2024
Feature request: Add support for a second message attribute on errors which is guaranteed not to include the failing instance Open

Enhancement Help Wanted

Difficulty 5/5 Over a week Newbie friendliness 42/100

python-jsonschema/jsonschema#1218 · 6 comments · 2 reactions · Opened Jan 26, 2024
Support encountering of a `"deprecated": true` keyword by propagating a deprecation warning Open

Dialects v2 Enhancement

Difficulty 4/5 3-5 days Newbie friendliness 35/100

python-jsonschema/jsonschema#1170 · 8 comments · Opened Sep 28, 2023
Inaccurate error message while using "unevaluatedProperties": False Open

Enhancement Error Reporting

Difficulty 3/5 1-2 days Newbie friendliness 35/100

python-jsonschema/jsonschema#1169 · 2 comments · Opened Sep 26, 2023
Instance validates if `multipleOf` is an integer, but fails if it's a float Open

Bug

Difficulty 3/5 1-2 days Newbie friendliness 45/100

python-jsonschema/jsonschema#1159 · 5 comments · Opened Sep 10, 2023
Getting $ref history Open

Dialects v2 Enhancement Error Reporting

Difficulty 4/5 3-5 days Newbie friendliness 25/100

python-jsonschema/jsonschema#1146 · 1 comment · Opened Jul 28, 2023
Injecting custom regex implementations Open

Dialects v2 Enhancement

Difficulty 5/5 Over a week Newbie friendliness 45/100

python-jsonschema/jsonschema#1142 · 21 comments · 1 reaction · Opened Jul 25, 2023
Ensure extended validators can create keywords which override exception messages Open

Dialects v2 Enhancement

Difficulty 4/5 3-5 days Newbie friendliness 45/100

python-jsonschema/jsonschema#1134 · 1 comment · Opened Jul 18, 2023
unevaluatedProperties error gets raised before more relevant validation errors Open

Enhancement Error Reporting

Difficulty 4/5 3-5 days Newbie friendliness 35/100

python-jsonschema/jsonschema#1132 · 1 comment · Opened Jul 18, 2023
Deprecate the `id_of` argument to `validators.create` and the `ID_OF` attribute on `Validator`s Open

Dialects v2 Pending Deprecation

Difficulty 5/5 Over a week Newbie friendliness 25/100

python-jsonschema/jsonschema#1091 · Opened Apr 24, 2023
Designating a dialect for custom metaschemas in 4.18 Open

Bug

Difficulty 4/5 3-5 days Newbie friendliness 42/100

python-jsonschema/jsonschema#1061 · 13 comments · Opened Mar 19, 2023
Issue with unevaluatedProperties and allOf and arrays Open

Needs Simplification

Difficulty 4/5 3-5 days Newbie friendliness 35/100

python-jsonschema/jsonschema#1026 · 1 comment · Opened Dec 6, 2022
Consider an API which collects validation errors and raises an exception group Open

Dialects v2 Enhancement Error Reporting

Difficulty 5/5 Over a week Newbie friendliness 25/100

python-jsonschema/jsonschema#1011 · 1 reaction · Opened Oct 25, 2022
Behavior when attempting to *override* an official dialect is not well defined when recursing into subschemas containing the official dialect's $schema identifier Open

Dialects v2 Enhancement

Difficulty 4/5 3-5 days Newbie friendliness 35/100

python-jsonschema/jsonschema#994 · 25 comments · 1 reaction · Opened Aug 31, 2022
Error message for "minContains" not easily reproducible with data available in the ValidationError Open

Bug Error Reporting

Difficulty 3/5 1-2 days Newbie friendliness 62/100

python-jsonschema/jsonschema#993 · 2 comments · Opened Aug 31, 2022
Error message for "additionalProperties" not easily reproducible with data available in the ValidationError Open

Bug Error Reporting

Difficulty 3/5 1-2 days Newbie friendliness 35/100

python-jsonschema/jsonschema#992 · 3 comments · 1 reaction · Opened Aug 31, 2022
Customize error messages (e.g. for translations) Open

Enhancement Error Reporting

Difficulty 5/5 Over a week Newbie friendliness 25/100

python-jsonschema/jsonschema#971 · 8 comments · 2 reactions · Opened Jul 9, 2022
Greedy (?) object typing leads to semantically wrong error message Open

Enhancement Error Reporting

Difficulty 5/5 Over a week Newbie friendliness 35/100

python-jsonschema/jsonschema#812 · 1 comment · Opened Jun 2, 2021
Idea: warn on unsupported keywords (e.g. "const" in draft-04 schemas) Open

Dialects v2 Enhancement

Difficulty 4/5 3-5 days Newbie friendliness 38/100

python-jsonschema/jsonschema#778 · 1 comment · 1 reaction · Opened Feb 3, 2021
Support additional (Python) types in more than the `type` validator Open

Dialects v2 Enhancement

Difficulty 5/5 Over a week Newbie friendliness 30/100

python-jsonschema/jsonschema#727 · 1 comment · 1 reaction · Opened Aug 21, 2020
Actually run and track runs of the benchmark suite Open

Enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

python-jsonschema/jsonschema#524 · Opened Jan 27, 2019
Validation errors should be able to indicate that a single error should be produced without collecting all of the details ahead of time Open

Dialects v2 Enhancement Error Reporting

Difficulty 5/5 Over a week Newbie friendliness 30/100

python-jsonschema/jsonschema#517 · Opened Jan 14, 2019
jsonschema.tests.test_validators.TestValidationErrorMessages should run across all drafts Open

Bug

Difficulty 3/5 1-2 days Newbie friendliness 35/100

python-jsonschema/jsonschema#504 · Opened Dec 7, 2018
VALIDATORS can leak implementation details about what function handles a validator Open

Bug Dialects v2

Difficulty 4/5 3-5 days Newbie friendliness 30/100

python-jsonschema/jsonschema#467 · Opened Sep 30, 2018
Support Validators with meta_schemas different than their own schemas Open

Dialects v2 Enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

python-jsonschema/jsonschema#451 · 2 reactions · Opened Aug 14, 2018
ErrorTree assumes one error per validator Open

Bug Error Reporting

Difficulty 3/5 1-2 days Newbie friendliness 35/100

python-jsonschema/jsonschema#442 · 4 comments · Opened Aug 3, 2018
Make json look prettier in errors Open

Dialects v2 Enhancement Error Reporting

Difficulty 4/5 3-5 days Newbie friendliness 35/100

python-jsonschema/jsonschema#243 · 13 comments · 1 reaction · Opened Jul 28, 2015
error object properties "schema" and "relative_schema_path" seem to be inconsistent Open

Bug Error Reporting Help Wanted

Difficulty 4/5 3-5 days Newbie friendliness 35/100

python-jsonschema/jsonschema#191 · 5 comments · Opened Jan 6, 2015
required, additionalProperties, propertyNames, dependentRequired and any other validators that reference property *names* need a way to indicate the erroring names in ValidationErrors Open

Enhancement Error Reporting

Difficulty 5/5 Over a week Newbie friendliness 35/100

python-jsonschema/jsonschema#119 · 30 comments · 14 reactions · Opened Aug 16, 2013

python-jsonschema/jsonschema

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