Python3实现读取TOML配置文件

# 项目通用配置
[project]
name = "python-toml-demo"
version = "1.0.0"
debug = true
port = 8000
# 数据库配置
[database]
host = "127.0.0.1"
port = 3306
username = "root"
password = "root123"
db_name = "test"
timeout = 30
# 日志配置
[log]
level = "INFO"
file_path = "./logs/app.log"
max_size = 10485760

import tomllib

pip install toml

import toml

# config.toml
[app]
name = "TOML测试项目"
env = "development"
port = 9000
[mysql]
host = "localhost"
user = "root"
password = "123456"
database = "demo"

# read_toml_demo.py
import tomllib

# 1. 读取配置文件
with open("config.toml", "rb") as f:
    config = tomllib.load(f)

# 2. 直接使用配置
print("项目名称：", config["app"]["name"])
print("运行环境：", config["app"]["env"])
print("MySQL 地址：", config["mysql"]["host"])

import toml

config = toml.load("config.toml")
print(config["app"]["name"])

# 基本类型
str_val = "字符串"
int_val = 100
float_val = 3.14
bool_val = true
# 数组
array_val = [1, 2, 3, 4]
# 层级表
[server]
ip = "192.168.1.100"
port = 8080

with open("config.toml", "rb") as f:
    config = tomllib.load(f)

print(type(config["bool_val"]))  # <class 'bool'>
print(type(config["array_val"])) # <class 'list'>
print(config["server"]["ip"])    # 192.168.1.100

# config.py
import tomllib
from pathlib import Path

class TomlConfig:
    """TOML 配置文件管理类"""
    _instance = None
    _config = None

    def __new__(cls, config_path="config.toml"):
        if cls._instance is None:
            cls._instance = super().__new__(cls)
            cls._load_config(config_path)
        return cls._instance

    @classmethod
    def _load_config(cls, config_path):
        """加载配置文件"""
        path = Path(config_path)
        if not path.exists():
            raise FileNotFoundError(f"配置文件不存在：{config_path}")
        
        try:
            with open(path, "rb") as f:
                cls._config = tomllib.load(f)
        except tomllib.TOMLDecodeError as e:
            raise ValueError(f"TOML 格式错误：{e}")

    def get(self, key: str, default=None):
        """
        获取配置（支持层级写法：app.name）
        示例：get("app.port")
        """
        keys = key.split(".")
        data = self._config
        for k in keys:
            if isinstance(data, dict) and k in data:
                data = data[k]
            else:
                return default
        return data

# 初始化全局配置
config = TomlConfig()

from config import config

# 直接获取配置
app_name = config.get("app.name")
mysql_host = config.get("mysql.host", "127.0.0.1")  # 带默认值

print(app_name)
print(mysql_host)

pip install toml

import toml
config = toml.load("config.toml")

[redis.cluster.node1]
host = "127.0.0.1"
port = 6379

config.get("redis.cluster.node1.host")