如何在文件夹层次结构中找到所有不同的文件扩展名？

import os

def get_file_extensions(folder_path):
    extensions = set()
    for root, dirs, files in os.walk(folder_path):
        for file in files:
            _, extension = os.path.splitext(file)
            if extension:
                extensions.add(extension)
    return extensions

folder_path = "path/to/your/folder"
extensions = get_file_extensions(folder_path)
print(extensions)