Support datetime, date, time, re.Pattern and Fraction types

[mauvilsa]

What does this PR do?

• Support for datetime, date and time types, parsed and serialized as ISO 8601 strings.
• Support for re.Pattern and Fraction types.
• Values of these types in Any arguments now dump as strings, where before a date was dumped as Unable to serialize instance ....
• A custom register_type(datetime, ...) can still be used for formats other than ISO 8601, since it replaces the built-in registration.

Before submitting

• Did you read the contributing guideline?
• If you used a coding agent, did you fully understand and validate all generated code and ensure it follows the contributing guidelines?
• Did you update the documentation? (readme and public docstrings)
• Did you write unit tests such that there is 100% coverage on related code? (required for bug fixes and new features)
• Did you verify that new and existing tests pass locally?
• [n/a] If this is a bug fix, did you verify that the tests fail without the code fix?
• Did you make sure that all changes preserve backward compatibility?
• Did you update the CHANGELOG including a pull request link? (not for typos, docs, test updates, or minor internal changes/refactors)

[greptile-apps]

Confidence Score: 3/5

[Medium risk] Adds support for five new type deserializers and serializers.

The PR is not safe to merge until pattern dumps preserve compilation behavior and handle bytes patterns.

Findings

1.  Pattern flags are lost ▶
2.  Bytes patterns break JSON dumps ▶

Summary

The PR adds built-in parsing and serialization for ISO-formatted datetime types, regular-expression patterns, and fractions, with documentation and tests. Pattern serialization needs attention because it loses compilation flags and cannot JSON-dump bytes patterns.

_{Reviews (1) · Last reviewed commit: "Support datetime, date, time, re.Pattern..."}

[sonarqubecloud]

Quality Gate passed

Issues
1 New issue
0 Accepted issues

Measures
0 Security Hotspots
100.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud