René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Add support for serde-json arbitrary_precision","articleBody":"When the `arbitrary_precision` feature is enabled, pythonize serializes all numbers like `{'$serde_json::private::Number': '2'}` instead of `2`.\n\n## To reproduce\n\n### Cargo.toml\n\n```toml\n[package]\nname = \"pythonize_bug\"\nversion = \"0.1.0\"\nedition = \"2024\"\n\n[lib]\ncrate-type = [\"cdylib\"]\n\n[dependencies]\npyo3 = { version = \"0.27\", features = [\"extension-module\"] }\npythonize = \"0.27\"\nserde_json = { version = \"1.0\", features = [\"arbitrary_precision\"] }\n```\n\n### pyproject.toml\n\n```toml\n[build-system]\nrequires = [\"maturin\u003e=1.4,\u003c2.0\"]\nbuild-backend = \"maturin\"\n\n[project]\nname = \"pythonize_bug\"\nversion = \"0.1.0\"\n\n[tool.maturin]\nmodule-name = \"pythonize_bug\"\n```\n\n### src/lib.rs\n\n```rust\nuse pyo3::prelude::*;\nuse pythonize::{depythonize, pythonize};\nuse serde_json::Value;\n\n#[pyfunction]\nfn test_roundtrip\u003c'py\u003e(py: Python\u003c'py\u003e, obj: Bound\u003c'py, PyAny\u003e) -\u003e PyResult\u003cBound\u003c'py, PyAny\u003e\u003e {\n    let value: Value = depythonize(\u0026obj)?;\n    Ok(pythonize(py, \u0026value)?)\n}\n\n#[pymodule]\nfn pythonize_bug(m: \u0026Bound\u003c'_, PyModule\u003e) -\u003e PyResult\u003c()\u003e {\n    m.add_function(wrap_pyfunction!(test_roundtrip, m)?)?;\n    Ok(())\n}\n```\n\n### Install\n\n```bash\nuv venv\nuv pip install maturin\nuv run maturin develop\n```\n\n### Run\n\n```shell-session\n$ uv run python -c 'from pythonize_bug import test_roundtrip; print(test_roundtrip(18446744073709551615))'\n{'$serde_json::private::Number': '18446744073709551615'}\n```\n\nIf `, features = [\"arbitrary_precision\"]` is removed from Cargo.toml and `uv run maturin develop` is run:\n\n```shell-session\n$ uv run python -c 'from pythonize_bug import test_roundtrip; print(test_roundtrip(18446744073709551615))'\nTraceback (most recent call last):\n  File \"\u003cstring\u003e\", line 1, in \u003cmodule\u003e\nException: JSON number out of range\n```\n","author":{"url":"https://github.com/jpmckinney","@type":"Person","name":"jpmckinney"},"datePublished":"2025-11-26T05:54:19.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":1},"url":"https://github.com/101/pythonize/issues/101"}