Function register_dialect

crates/stdlib/src/csv.rs:267–289

(
        name: PyObjectRef,
        dialect: OptionalArg<PyObjectRef>,
        opts: FormatOptions,
        // TODO: handle quote style, etc
        mut _rest: FuncArgs,
        vm: &VirtualMachine,

    #[pyfunction]
    fn register_dialect(
        name: PyObjectRef,
        dialect: OptionalArg<PyObjectRef>,
        opts: FormatOptions,
        // TODO: handle quote style, etc
        mut _rest: FuncArgs,
        vm: &VirtualMachine,
    ) -> PyResult<()> {
        let name = name
            .downcast::<PyStr>()
            .map_err(|_| vm.new_type_error("argument 0 must be a string"))?;
        let name: PyUtf8StrRef = name.try_into_utf8(vm)?;
        let dialect = match dialect {
            OptionalArg::Present(d) => PyDialect::try_from_object(vm, d)
                .map_err(|_| vm.new_type_error("argument 1 must be a dialect object"))?,
            OptionalArg::Missing => opts.result(vm)?,
        };
        let dialect = opts.update_py_dialect(dialect);
        GLOBAL_HASHMAP
            .lock()
            .insert(name.as_str().to_owned(), dialect);
        Ok(())
    }

    #[pyfunction]
    fn get_dialect(