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一个用于简化PostgreSQL数据库操作的Python工具包

Project description

PgSQL Utils

一个用于简化 PostgreSQL 数据库操作的 Python 工具包。

功能特点

  • 单例模式数据库连接管理
  • 支持多种配置方式(环境变量、配置文件、直接传参)
  • 自动序列重置功能,避免主键冲突
  • 支持字典类型数据自动转换为 JSON 字符串
  • 提供多种便捷的数据操作方法:
    • find: 查询数据
    • add: 插入单条数据
    • add_batch: 批量插入数据
    • add_smart: 智能插入(冲突时更新)
    • update: 更新数据
    • delete: 删除数据
    • execute: 执行 SQL 语句
    • execute_query: 执行查询语句
    • execute_update: 执行更新语句

安装

pip install pgsql-utils

使用方法

  1. 基本使用

    from pgsql_utils import PostgreSQLUtils
    
    # 方式1: 直接传参
    db = PostgreSQLUtils("localhost", "mydb", "user", "password", 5432)
    
    # 方式2: 从环境变量读取配置
    # 需要设置环境变量: PGSQL_IP, PGSQL_DB, PGSQL_USER_NAME, PGSQL_USER_PASS, PGSQL_PORT
    db = PostgreSQLUtils()
    
    # 方式3: 从配置文件读取
    db = PostgreSQLUtils.from_config_file("config.json")
    
    # 方式4: 从设置模块读取
    import your_setting_module
    db = PostgreSQLUtils.from_settings(your_setting_module)
    
    # 方式5: 直接使用预定义的全局实例(需要先配置环境变量或配置文件)
    from pgsql_utils import db
    
  2. 查询数据

    # 查询数据并以字典形式返回
    results = db.find("SELECT * FROM news_table WHERE category_id = %s", True, 1)
    for result in results: 
        print(result)
    
  3. 插入数据

    # 插入单条数据
    data = { "title": "新闻标题", "content": "新闻内容", "publish_time": "2023-01-01 12:00:00" }
    db.add("news_table", data)
    
    # 批量插入数据
    data_list = [ {"title": "新闻1", "content": "内容1"}, {"title": "新闻2", "content": "内容2"} ]
    db.add_batch("news_table", data_list)
    
  4. 智能插入(冲突时更新)

    data = { "id": 1, "title": "更新的标题", "content": "更新的内容" }
    db.add_smart("news_table", data)
    
  5. 更新和删除数据

    # 更新数据
    db.update("news_table", {"title": "新标题"}, "id = %s", (1,))
    
    # 删除数据
    db.delete("news_table", "id = %s", (1,))
    

配置

  • 环境变量配置

    export PGSQL_IP=localhost
    export PGSQL_DB=your_database 
    export PGSQL_USER_NAME=your_username
    export PGSQL_USER_PASS=your_password
    export PGSQL_PORT=5432
    
  • JSON配置文件示例

    {
        "host": "localhost",
        "database": "your_database",
        "user": "your_username",
        "password": "your_password",
        "port": 5432
    }
    
  • 设置模块文件示例

    # PostgreSQL
    PGSQL_IP = "host"
    PGSQL_PORT = 5432
    PGSQL_DB = "your_database"
    PGSQL_USER_NAME = "your_username"
    PGSQL_USER_PASS = "your_password"
    

依赖

  • psycopg2>=2.9.10
  • colorPrintConsole>=1.0.7

许可证

Apache-2.0 License

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