如何查找不带'-‘的最后一行

last_line = None
with open('file.txt', 'r') as file:
    for line in file:
        if '-' not in line:
            last_line = line
print(last_line)

const fs = require('fs');
let lastLine = null;
const lines = fs.readFileSync('file.txt', 'utf-8').split('\n');
for (const line of lines) {
    if (!line.includes('-')) {
        lastLine = line;
    }
}
console.log(lastLine);