Python循环创建关联多维数组：WireGuard配置解析问题

刚学Python处理wg.conf解析时，很容易踩“覆盖Peer条目”的坑——把多个Peer最后变成单个字典，而不是数组。下面直接针对你的问题给出修正方案：

配置文件示例（wg.conf） #

[Interface]
PrivateKey = abc123
Address = 10.0.0.1/24
ListenPort = 51820

[Peer]
PublicKey = def456
AllowedIPs = 10.0.0.2/32

[Peer]
PublicKey = ghi789
AllowedIPs = 10.0.0.3/32
Endpoint = example.com:51820

期望的结构化结果 #

{
    "Interface": {
        "PrivateKey": "abc123",
        "Address": "10.0.0.1/24",
        "ListenPort": "51820"
    },
    "Peers": [
        {
            "PublicKey": "def456",
            "AllowedIPs": "10.0.0.2/32"
        },
        {
            "PublicKey": "ghi789",
            "AllowedIPs": "10.0.0.3/32",
            "Endpoint": "example.com:51820"
        }
    ]
}

当前问题代码 #

config = {}
peer = {}

with open('wg.conf', 'r') as f:
    for line in f:
        line = line.strip()
        if not line or line.startswith('#'):
            continue
        if line.startswith('[Interface]'):
            config['Interface'] = {}
            current_section = config['Interface']
        elif line.startswith('[Peer]'):
            # 核心问题：每次遇到新Peer直接覆盖，没有追加到数组
            config['Peers'] = peer
            current_section = peer
        else:
            key, value = line.split('=', 1)
            key = key.strip()
            value = value.strip()
            current_section[key] = value

实际错误输出 #

最后一个Peer会覆盖之前的，且Peers是单个字典而非数组：

{
    "Interface": {
        "PrivateKey": "abc123",
        "Address": "10.0.0.1/24",
        "ListenPort": "51820"
    },
    "Peers": {
        "PublicKey": "ghi789",
        "AllowedIPs": "10.0.0.3/32",
        "Endpoint": "example.com:51820"
    }
}

修正后的代码 #

# 提前初始化好结构：Interface为空字典，Peers为空数组
config = {
    "Interface": {},
    "Peers": []
}
current_peer = None

with open('wg.conf', 'r') as f:
    for line in f:
        line = line.strip()
        if not line or line.startswith('#'):
            continue
        if line.startswith('[Interface]'):
            current_section = config['Interface']
        elif line.startswith('[Peer]'):
            # 遇到新Peer时，创建新字典并追加到Peers数组
            current_peer = {}
            config['Peers'].append(current_peer)
            current_section = current_peer
        else:
            key, value = line.split('=', 1)
            key = key.strip()
            value = value.strip()
            current_section[key] = value

关键修改说明 #

1. 初始化结构：一开始就把Peers设为空数组，避免后续覆盖
2. 处理Peer段：每次碰到[Peer]，就新建一个空字典，用append()加入Peers数组，再把当前操作的段指向这个新字典
3. 避免覆盖：不再用单个peer变量反复赋值，而是每个Peer对应独立的字典，全部存在数组里

运行修正后的代码，就能得到你想要的多Peer数组结构。

内容的提问来源于stack exchange，提问作者Михаил Макрашин