Python:如何迭代所有目录，除了在文件中定义的通配符排除？

import os
import fnmatch

def iterate_directories(root_dir, exclude_pattern):
    for root, dirs, files in os.walk(root_dir):
        # 排除通配符匹配的文件
        files = [f for f in files if not fnmatch.fnmatch(f, exclude_pattern)]
        for file in files:
            file_path = os.path.join(root, file)
            # 处理文件
            # ...
            print(file_path)  # 示例：打印文件路径

root_dir = '/path/to/root/directory'
exclude_pattern = '*.txt'  # 示例：排除所有txt文件
iterate_directories(root_dir, exclude_pattern)