docker 启动 postgres 15 设置密码为：zR6c49Mmmf4Rc6Vk请帮我写出docker-compose 配置。并使用python 测试连接 postgres 数据库

version: '3.1' services: db: image: postgres:15 restart: always environment: POSTGRES_PASSWORD: zR6c49Mmmf4Rc6Vk ports: - "5432:5432" volumes: - db-data:/var/lib/postgresql/data volumes: db-data:

Python 连接 Postgres 数据库示例代码：

import psycopg2

conn = psycopg2.connect(
    host="localhost",
    database="postgres",
    user="postgres",
    password="zR6c49Mmmf4Rc6Vk"
)

cur = conn.cursor()
cur.execute("SELECT version();")
print(cur.fetchone())

cur.close()
conn.close()