我该如何检测文本文件中使用的分隔符？

with open('file.txt', 'r') as file:
    content = file.read()
    lines = content.split('\n')
    for line in lines:
        print(line)

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

public class Main {
    public static void main(String[] args) {
        try {
            BufferedReader br = new BufferedReader(new FileReader("file.txt"));
            String line;
            while ((line = br.readLine()) != null) {
                String[] values = line.split(",");
                for (String value : values) {
                    System.out.println(value);
                }
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

awk -F ',' '{print $1}' file.txt

Get-Content file.txt | ForEach-Object { $_.Split(',') }