Python -获取路径的子字符串

import os

def get_substring(path, start, end):
    basename = os.path.basename(path)
    parent_dir = os.path.dirname(path)
    substring = parent_dir[start:end] + basename
    return substring

# 示例路径
path = '/home/user/documents/file.txt'

# 获取路径的子字符串，从第6个字符到倒数第5个字符
substring = get_substring(path, 5, -5)
print(substring)

user/documents/file