如何获取目录和子目录，并按父目录和子目录分组

import os

def get_directory_structure(root_directory):
    directory_structure = {}
    
    for root, dirs, files in os.walk(root_directory):
        parent_directory = os.path.basename(root)
        subdirectories = [os.path.basename(d) for d in dirs]
        
        if parent_directory not in directory_structure:
            directory_structure[parent_directory] = []
        
        directory_structure[parent_directory].extend(subdirectories)
    
    return directory_structure

root_directory = '/path/to/root/directory'
directory_structure = get_directory_structure(root_directory)

for parent_directory, subdirectories in directory_structure.items():
    print(f"Parent Directory: {parent_directory}")
    print(f"Subdirectories: {subdirectories}")
    print()