如何拆分SSH地址+路径？

import re

def split_ssh_address(ssh_address):
    # 检查是否符合SSH地址格式
    pattern = r'^((\w+)@)?([\w.-]+)(:(\d+))?$'
    match = re.match(pattern, ssh_address)
    if not match:
        return None, None, None
    
    # 提取用户名、主机名和端口号
    username = match.group(2)
    hostname = match.group(3)
    port = match.group(5)
    
    # 拆分路径
    path = None
    if '/' in hostname:
        hostname, path = hostname.split('/', 1)
    
    return username, hostname, port, path

# 示例用法
ssh_address = 'username@hostname:22/path/to/file'
username, hostname, port, path = split_ssh_address(ssh_address)
print('用户名:', username)
print('主机名:', hostname)
print('端口号:', port)
print('路径:', path)

用户名: username
主机名: hostname
端口号: 22
路径: path/to/file