formatparse-pyo3 0.8.1

PyO3 bindings for formatparse (native _formatparse extension; use PyPI for Python installs)
Documentation 
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use crate::datetime::common::get_abbreviated_month_map;
use once_cell::sync::Lazy;
use pyo3::prelude::*;
use pyo3::IntoPyObjectExt;
use regex::Regex;

// Cached regex pattern for system datetime parsing
static RE_SYSTEM_DATETIME: Lazy<Regex> = Lazy::new(|| {
    Regex::new(r"^(Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec)\s+(\d{1,2})\s+(\d{2}):(\d{2}):(\d{2})$").unwrap()
});

/// Parse Linux system log format: Nov 21 10:21:36 (year is current year)
pub fn parse_system_datetime(py: Python, value: &str) -> PyResult<PyObject> {
    let datetime_module = py.import("datetime")?;
    let datetime_class = datetime_module.getattr("datetime")?;
    let today = datetime_class.call_method0("today")?;
    let current_year: i32 = today.getattr("year")?.extract()?;

    let month_map = get_abbreviated_month_map();

    // Nov 21 10:21:36 or Nov  1 10:21:36 (note the double space)
    if let Some(caps) = RE_SYSTEM_DATETIME.captures(value) {
        if let (
            Some(month_match),
            Some(day_match),
            Some(hour_match),
            Some(minute_match),
            Some(second_match),
        ) = (
            caps.get(1),
            caps.get(2),
            caps.get(3),
            caps.get(4),
            caps.get(5),
        ) {
            let month_name = month_match.as_str();
            let month = *month_map.get(month_name).ok_or_else(|| {
                PyErr::new::<pyo3::exceptions::PyValueError, _>(format!(
                    "Invalid month: {}",
                    month_name
                ))
            })?;
            let day: u8 = day_match
                .as_str()
                .trim()
                .parse()
                .map_err(|_| PyErr::new::<pyo3::exceptions::PyValueError, _>("Invalid day"))?;
            let hour: u8 = hour_match
                .as_str()
                .parse()
                .map_err(|_| PyErr::new::<pyo3::exceptions::PyValueError, _>("Invalid hour"))?;
            let minute: u8 = minute_match
                .as_str()
                .parse()
                .map_err(|_| PyErr::new::<pyo3::exceptions::PyValueError, _>("Invalid minute"))?;
            let second: u8 = second_match
                .as_str()
                .parse()
                .map_err(|_| PyErr::new::<pyo3::exceptions::PyValueError, _>("Invalid second"))?;

            let dt = datetime_class.call1((
                current_year,
                month,
                day,
                hour,
                minute,
                second,
                0,
                py.None(),
            ))?;
            return dt.into_py_any(py);
        }
    }

    Err(PyErr::new::<pyo3::exceptions::PyValueError, _>(format!(
        "Invalid system datetime: {}",
        value
    )))
}