在python中查找并输出重复的文件，行之间用逗号分隔

import os
import hashlib

def calculate_hash(file_path):
    with open(file_path, 'rb') as file:
        content = file.read()
        file_hash = hashlib.md5(content).hexdigest()
    return file_hash

def find_duplicate_files(directory):
    file_hash_dict = {}
    duplicate_files = []

    for root, dirs, files in os.walk(directory):
        for file in files:
            file_path = os.path.join(root, file)
            file_hash = calculate_hash(file_path)

            if file_hash in file_hash_dict:
                duplicate_files.append(file_path)
                duplicate_files.append(file_hash_dict[file_hash])
            else:
                file_hash_dict[file_hash] = file_path

    return duplicate_files

directory = '指定要查找的目录路径'
duplicate_files = find_duplicate_files(directory)

output = ','.join(duplicate_files)
print(output)