Function sub

crates/stdlib/src/re.rs:122–134

(
        pattern: PyStrRef,
        repl: PyStrRef,
        string: PyStrRef,
        count: OptionalArg<usize>,
        flags: OptionalArg<usize>,
        vm: &VirtualMachine,
    )

    #[pyfunction]
    fn sub(
        pattern: PyStrRef,
        repl: PyStrRef,
        string: PyStrRef,
        count: OptionalArg<usize>,
        flags: OptionalArg<usize>,
        vm: &VirtualMachine,
    ) -> PyResult<String> {
        let flags = extract_flags(flags);
        let regex = make_regex(vm, pattern.as_str(), flags)?;
        let limit = count.unwrap_or(0);
        Ok(do_sub(&regex, repl, string, limit))
    }

    #[pyfunction]
    fn findall(