json2xml 7.1.0

json2xml 7.1.0

Released 2026-09-03.

Highlights

• Enforces conversion depth and item limits inside the native payload walk when json2xml-rs>=0.6.0 is installed, so the accelerated path no longer pays for a second Python-level traversal. A 2,000-record conversion drops from 7.1 ms to 1.4 ms.
• Keeps tuples on the Python serializer, closing the last known case where the two backends rendered the same payload differently.
• Writes identical CLI output to stdout and --output files: UTF-8 bytes ending in exactly one newline.
• Accepts numbers and other scalars in dicttoxml_fast.escape_xml and wrap_cdata whichever backend is active, and raises InvalidDataError from Json2xml.to_xml for every value the serializer rejects.
• Loads the optional Rust backend through one tested function that also keeps working with json2xml-rs 0.5.0.

Behaviour changes and migration guidance

• Files written with --output now end with a single newline, matching stdout. Stdout is written as UTF-8 bytes regardless of the console encoding.
• readfromjson raises JSONReadError("Could not read JSON file") when the file cannot be opened; only parse failures keep the Invalid JSON File message.
• Json2xml.to_xml raises InvalidDataError instead of TypeError for unsupported values such as a Mapping that is not a dict.
• json2xml.backend_selector.ConversionRequest and has_special_keys are removed. Use json2xml.dicttoxml.SerializerConfig, which the selector now shares with the serializer, and rust_renders_identically for the payload gate.
• json2xml_rs.dicttoxml called directly with tuples, sets, iterators, or arbitrary objects raises TypeError in 0.6.0; the json2xml wrapper routes such payloads to Python as before.

Package Versions

• Python package: json2xml==7.1.0
• Rust accelerator: json2xml-rs==0.6.0
• Fast install: pip install "json2xml[fast]==7.1.0"

Verification

The release passed Ruff, ty, 650 Python tests with 100% statement coverage, Rust formatting, Clippy with warnings denied, 47 Rust unit tests, package builds, Twine metadata checks, an isolated fast-install smoke test, and the hosted Python and Rust compatibility matrices.