如何在存在重复文件时更改重命名模式

import os

def rename_files_with_increment(directory):
    files = {}
    for filename in os.listdir(directory):
        name, ext = os.path.splitext(filename)
        if name in files:
            files[name].append(ext)
        else:
            files[name] = [ext]
    
    for name, ext_list in files.items():
        if len(ext_list) > 1:
            for i, ext in enumerate(ext_list, start=1):
                new_filename = f"{name}_{i}{ext}"
                old_path = os.path.join(directory, name + ext)
                new_path = os.path.join(directory, new_filename)
                os.rename(old_path, new_path)
                print(f"Renamed: {old_path} -> {new_path}")

# 使用示例
rename_files_with_increment('/path/to/directory')