如何将文本文件中的行读入i32s的元组向量？

use std::fs::File;
use std::io::{BufRead, BufReader};

fn main() {
    let file = File::open("file.txt").expect("Failed to open file");
    let reader = BufReader::new(file);
    let mut vector: Vec<(i32, i32)> = Vec::new();

    for line in reader.lines() {
        if let Ok(line) = line {
            let fields: Vec<&str> = line.split(',').collect();
            if fields.len() == 2 {
                if let (Ok(num1), Ok(num2)) = (fields[0].parse::<i32>(), fields[1].parse::<i32>()) {
                    vector.push((num1, num2));
                }
            }
        }
    }

    for tuple in vector {
        println!("{:?}", tuple);
    }
}