如何反转文本文件的行？

with open('input.txt', 'r') as file:
    lines = file.readlines()

with open('output.txt', 'w') as file:
    for line in reversed(lines):
        file.write(line)

import java.io.BufferedReader;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;

public class ReverseFile {
    public static void main(String[] args) {
        try {
            BufferedReader reader = new BufferedReader(new FileReader("input.txt"));
            String line = reader.readLine();
            StringBuilder sb = new StringBuilder();
            while (line != null) {
                sb.append(line).append("\n");
                line = reader.readLine();
            }
            reader.close();
            String reversed = sb.reverse().toString();
            FileWriter writer = new FileWriter("output.txt");
            writer.write(reversed);
            writer.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

const fs = require('fs');

fs.readFile('input.txt', 'utf8', (err, data) => {
    if (err) throw err;
    const lines = data.split('\n');
    const reversed = lines.reverse().join('\n');
    fs.writeFile('output.txt', reversed, (err) => {
        if (err) throw err;
    });
});