{"id":1127184,"date":"2025-01-08T20:08:01","date_gmt":"2025-01-08T12:08:01","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/1127184.html"},"modified":"2025-01-08T20:08:05","modified_gmt":"2025-01-08T12:08:05","slug":"python%e5%a6%82%e4%bd%95%e8%bf%9e%e6%8e%a5%e6%95%b0%e6%8d%ae%e5%ba%93%e4%b8%ad%e9%97%b4%e4%bb%b6","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/1127184.html","title":{"rendered":"python\u5982\u4f55\u8fde\u63a5\u6570\u636e\u5e93\u4e2d\u95f4\u4ef6"},"content":{"rendered":"<p style=\"text-align:center;\" ><img decoding=\"async\" src=\"https:\/\/cdn-kb.worktile.com\/kb\/wp-content\/uploads\/2024\/04\/25094251\/0d161245-8cb7-42d4-8a02-3dfd2849b333.webp\" alt=\"python\u5982\u4f55\u8fde\u63a5\u6570\u636e\u5e93\u4e2d\u95f4\u4ef6\" \/><\/p>\n<p><p> <strong>Python\u5982\u4f55\u8fde\u63a5\u6570\u636e\u5e93\u4e2d\u95f4\u4ef6<\/strong><\/p>\n<\/p>\n<p><p><strong>\u4f7f\u7528Python\u8fde\u63a5\u6570\u636e\u5e93\u4e2d\u95f4\u4ef6\u901a\u5e38\u9700\u8981\u5b89\u88c5\u9002\u5f53\u7684\u9a71\u52a8\u7a0b\u5e8f\u3001\u4f7f\u7528\u5408\u9002\u7684\u6570\u636e\u5e93\u8fde\u63a5\u5e93\u3001\u914d\u7f6e\u6570\u636e\u5e93\u8fde\u63a5\u53c2\u6570<\/strong>\u3002\u5176\u4e2d\u6700\u5e38\u7528\u7684\u65b9\u6cd5\u4e4b\u4e00\u662f\u4f7f\u7528ORM\uff08\u5bf9\u8c61\u5173\u7cfb\u6620\u5c04\uff09\u5de5\u5177\uff0c\u5982SQLAlchemy\uff0c\u5b83\u80fd\u5e2e\u52a9\u7b80\u5316\u6570\u636e\u5e93\u64cd\u4f5c\u3002\u63a5\u4e0b\u6765\uff0c\u6211\u4eec\u5c06\u8be6\u7ec6\u63a2\u8ba8\u5982\u4f55\u4f7f\u7528Python\u8fde\u63a5\u6570\u636e\u5e93\u4e2d\u95f4\u4ef6\uff0c\u5c24\u5176\u662f\u901a\u8fc7SQLAlchemy\u6765\u5b9e\u73b0\u3002<\/p>\n<\/p>\n<hr>\n<p><h3>\u4e00\u3001\u5b89\u88c5\u548c\u914d\u7f6e\u6570\u636e\u5e93\u9a71\u52a8\u7a0b\u5e8f<\/h3>\n<\/p>\n<p><h4>1. \u5b89\u88c5\u6570\u636e\u5e93\u9a71\u52a8\u7a0b\u5e8f<\/h4>\n<\/p>\n<p><p>\u5728\u4f7f\u7528Python\u8fde\u63a5\u6570\u636e\u5e93\u4e4b\u524d\uff0c\u9996\u5148\u9700\u8981\u5b89\u88c5\u76f8\u5e94\u7684\u6570\u636e\u5e93\u9a71\u52a8\u7a0b\u5e8f\u3002\u4f8b\u5982\uff0c\u82e5\u8981\u8fde\u63a5MySQL\u6570\u636e\u5e93\uff0c\u53ef\u4f7f\u7528<code>mysql-connector-python<\/code>\u6216<code>PyMySQL<\/code>\u3002\u5b89\u88c5\u65b9\u6cd5\u5982\u4e0b\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-bash\">pip install mysql-connector-python<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u6216<\/p>\n<\/p>\n<p><pre><code class=\"language-bash\">pip install PyMySQL<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u9488\u5bf9\u5176\u4ed6\u6570\u636e\u5e93\uff0c\u53ef\u4ee5\u5b89\u88c5\u76f8\u5e94\u7684\u9a71\u52a8\u7a0b\u5e8f\uff0c\u5982PostgreSQL\u7684<code>psycopg2<\/code>\u3001SQLite\u7684<code>sqlite3<\/code>\u7b49\u3002<\/p>\n<\/p>\n<p><h4>2. \u914d\u7f6e\u6570\u636e\u5e93\u8fde\u63a5\u53c2\u6570<\/h4>\n<\/p>\n<p><p>\u8fde\u63a5\u6570\u636e\u5e93\u65f6\uff0c\u9700\u8981\u51c6\u5907\u597d\u4ee5\u4e0b\u57fa\u672c\u53c2\u6570\uff1a<\/p>\n<\/p>\n<ul>\n<li>\u6570\u636e\u5e93\u4e3b\u673a\u5730\u5740\uff08host\uff09<\/li>\n<li>\u6570\u636e\u5e93\u7aef\u53e3\uff08port\uff09<\/li>\n<li>\u6570\u636e\u5e93\u7528\u6237\u540d\uff08user\uff09<\/li>\n<li>\u6570\u636e\u5e93\u5bc6\u7801\uff08password\uff09<\/li>\n<li>\u6570\u636e\u5e93\u540d\u79f0\uff08database\uff09<\/li>\n<\/ul>\n<p><h3>\u4e8c\u3001\u4f7f\u7528SQLAlchemy\u8fdb\u884c\u6570\u636e\u5e93\u64cd\u4f5c<\/h3>\n<\/p>\n<p><h4>1. \u5b89\u88c5SQLAlchemy<\/h4>\n<\/p>\n<p><p>SQLAlchemy\u662f\u4e00\u4e2a\u529f\u80fd\u5f3a\u5927\u7684Python SQL\u5de5\u5177\u5305\u548c\u5bf9\u8c61\u5173\u7cfb\u6620\u5c04\uff08ORM\uff09\u5e93\u3002\u5b89\u88c5SQLAlchemy\u7684\u65b9\u6cd5\u5982\u4e0b\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-bash\">pip install SQLAlchemy<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><h4>2. \u914d\u7f6e\u8fde\u63a5\u5b57\u7b26\u4e32<\/h4>\n<\/p>\n<p><p>\u8fde\u63a5\u6570\u636e\u5e93\u9700\u8981\u4e00\u4e2a\u8fde\u63a5\u5b57\u7b26\u4e32\uff0c\u683c\u5f0f\u5982\u4e0b\uff1a<\/p>\n<\/p>\n<p><pre><code>dialect+driver:\/\/username:password@host:port\/database<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u4f8b\u5982\uff0c\u8fde\u63a5MySQL\u6570\u636e\u5e93\u7684\u8fde\u63a5\u5b57\u7b26\u4e32\u53ef\u80fd\u662f\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">connection_string = &#39;mysql+mysqlconnector:\/\/username:password@localhost:3306\/database_name&#39;<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><h4>3. \u521b\u5efa\u6570\u636e\u5e93\u5f15\u64ce<\/h4>\n<\/p>\n<p><p>\u4f7f\u7528SQLAlchemy\u521b\u5efa\u6570\u636e\u5e93\u5f15\u64ce\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">from sqlalchemy import create_engine<\/p>\n<p>engine = create_engine(connection_string)<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><h4>4. \u521b\u5efa\u4f1a\u8bdd<\/h4>\n<\/p>\n<p><p>\u4f1a\u8bdd\uff08Session\uff09\u7528\u4e8e\u6267\u884c\u6570\u636e\u5e93\u64cd\u4f5c\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">from sqlalchemy.orm import sessionmaker<\/p>\n<p>Session = sessionmaker(bind=engine)<\/p>\n<p>session = Session()<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><h3>\u4e09\u3001\u5b9a\u4e49\u6a21\u578b\u548c\u64cd\u4f5c\u6570\u636e\u5e93<\/h3>\n<\/p>\n<p><h4>1. \u5b9a\u4e49\u6a21\u578b<\/h4>\n<\/p>\n<p><p>\u4f7f\u7528SQLAlchemy\u5b9a\u4e49\u6570\u636e\u8868\u5bf9\u5e94\u7684\u6a21\u578b\u7c7b\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">from sqlalchemy.ext.declarative import declarative_base<\/p>\n<p>from sqlalchemy import Column, Integer, String<\/p>\n<p>Base = declarative_base()<\/p>\n<p>class User(Base):<\/p>\n<p>    __tablename__ = &#39;users&#39;<\/p>\n<p>    id = Column(Integer, primary_key=True)<\/p>\n<p>    name = Column(String)<\/p>\n<p>    age = Column(Integer)<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><h4>2. \u521b\u5efa\u8868<\/h4>\n<\/p>\n<p><p>\u901a\u8fc7\u6a21\u578b\u7c7b\u521b\u5efa\u6570\u636e\u8868\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">Base.metadata.create_all(engine)<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><h4>3. \u63d2\u5165\u6570\u636e<\/h4>\n<\/p>\n<p><p>\u901a\u8fc7\u4f1a\u8bdd\u5bf9\u8c61\u63d2\u5165\u6570\u636e\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">new_user = User(name=&#39;Alice&#39;, age=25)<\/p>\n<p>session.add(new_user)<\/p>\n<p>session.commit()<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><h4>4. \u67e5\u8be2\u6570\u636e<\/h4>\n<\/p>\n<p><p>\u901a\u8fc7\u4f1a\u8bdd\u5bf9\u8c61\u67e5\u8be2\u6570\u636e\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">users = session.query(User).all()<\/p>\n<p>for user in users:<\/p>\n<p>    print(user.name, user.age)<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><h3>\u56db\u3001\u5904\u7406\u6570\u636e\u5e93\u8fde\u63a5\u4e2d\u7684\u9519\u8bef<\/h3>\n<\/p>\n<p><h4>1. \u5e38\u89c1\u9519\u8bef\u7c7b\u578b<\/h4>\n<\/p>\n<p><p>\u5728\u8fde\u63a5\u548c\u64cd\u4f5c\u6570\u636e\u5e93\u65f6\uff0c\u53ef\u80fd\u4f1a\u9047\u5230\u4ee5\u4e0b\u5e38\u89c1\u9519\u8bef\uff1a<\/p>\n<\/p>\n<ul>\n<li>\u8fde\u63a5\u5931\u8d25\uff1a\u901a\u5e38\u7531\u4e8e\u6570\u636e\u5e93\u5730\u5740\u3001\u7528\u6237\u540d\u6216\u5bc6\u7801\u9519\u8bef\u3002<\/li>\n<li>\u8d85\u65f6\uff1a\u8fde\u63a5\u8d85\u65f6\u6216\u67e5\u8be2\u8d85\u65f6\u3002<\/li>\n<li>\u6570\u636e\u5e93\u4e0d\u5b58\u5728\uff1a\u6307\u5b9a\u7684\u6570\u636e\u5e93\u4e0d\u5b58\u5728\u3002<\/li>\n<\/ul>\n<p><h4>2. \u9519\u8bef\u5904\u7406<\/h4>\n<\/p>\n<p><p>\u4f7f\u7528try-except\u5757\u6355\u83b7\u548c\u5904\u7406\u9519\u8bef\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">try:<\/p>\n<p>    session.add(new_user)<\/p>\n<p>    session.commit()<\/p>\n<p>except Exception as e:<\/p>\n<p>    session.rollback()<\/p>\n<p>    print(f&quot;Error: {e}&quot;)<\/p>\n<p>finally:<\/p>\n<p>    session.close()<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><h3>\u4e94\u3001\u4f18\u5316\u6570\u636e\u5e93\u8fde\u63a5<\/h3>\n<\/p>\n<p><h4>1. \u4f7f\u7528\u8fde\u63a5\u6c60<\/h4>\n<\/p>\n<p><p>SQLAlchemy\u652f\u6301\u8fde\u63a5\u6c60\uff0c\u53ef\u4ee5\u63d0\u9ad8\u6570\u636e\u5e93\u8fde\u63a5\u7684\u6548\u7387\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">engine = create_engine(connection_string, pool_size=10, max_overflow=20)<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><h4>2. \u4f7f\u7528\u5f02\u6b65\u6570\u636e\u5e93\u8fde\u63a5<\/h4>\n<\/p>\n<p><p>\u5bf9\u4e8e\u9ad8\u5e76\u53d1\u573a\u666f\uff0c\u53ef\u4ee5\u8003\u8651\u4f7f\u7528\u5f02\u6b65\u6570\u636e\u5e93\u8fde\u63a5\u5e93\uff0c\u5982<code>asyncpg<\/code>\uff08\u9002\u7528\u4e8ePostgreSQL\uff09\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">import asyncio<\/p>\n<p>from sqlalchemy.ext.asyncio import create_async_engine, AsyncSession<\/p>\n<p>from sqlalchemy.orm import sessionmaker<\/p>\n<p>async_engine = create_async_engine(&#39;postgresql+asyncpg:\/\/username:password@localhost\/dbname&#39;, echo=True)<\/p>\n<p>AsyncSessionLocal = sessionmaker(bind=async_engine, class_=AsyncSession, expire_on_commit=False)<\/p>\n<p>async def async_m<a href=\"https:\/\/docs.pingcode.com\/blog\/59162.html\" target=\"_blank\">AI<\/a>n():<\/p>\n<p>    async with AsyncSessionLocal() as session:<\/p>\n<p>        result = await session.execute(&quot;SELECT * FROM users&quot;)<\/p>\n<p>        users = result.scalars().all()<\/p>\n<p>        for user in users:<\/p>\n<p>            print(user.name, user.age)<\/p>\n<p>asyncio.run(async_main())<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><h3>\u516d\u3001\u4f7f\u7528\u6570\u636e\u5e93\u4e2d\u95f4\u4ef6\u8fdb\u884c\u8d1f\u8f7d\u5747\u8861\u548c\u5bb9\u9519<\/h3>\n<\/p>\n<p><h4>1. \u8d1f\u8f7d\u5747\u8861<\/h4>\n<\/p>\n<p><p>\u6570\u636e\u5e93\u4e2d\u95f4\u4ef6\u53ef\u4ee5\u5b9e\u73b0\u8d1f\u8f7d\u5747\u8861\uff0c\u5206\u914d\u67e5\u8be2\u8bf7\u6c42\u5230\u4e0d\u540c\u7684\u6570\u636e\u5e93\u5b9e\u4f8b\u4e0a\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-python\"># \u4f7f\u7528MySQL\u4e2d\u95f4\u4ef6\u5982ProxySQL\u8fdb\u884c\u8d1f\u8f7d\u5747\u8861<\/p>\n<p>connection_string = &#39;mysql+mysqlconnector:\/\/username:password@proxysql_host:6033\/database_name&#39;<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><h4>2. \u5bb9\u9519\u5904\u7406<\/h4>\n<\/p>\n<p><p>\u6570\u636e\u5e93\u4e2d\u95f4\u4ef6\u8fd8\u53ef\u4ee5\u5b9e\u73b0\u81ea\u52a8\u6545\u969c\u8f6c\u79fb\uff0c\u5f53\u4e3b\u6570\u636e\u5e93\u6545\u969c\u65f6\uff0c\u81ea\u52a8\u5207\u6362\u5230\u5907\u7528\u6570\u636e\u5e93\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-python\"># \u8fde\u63a5\u5b57\u7b26\u4e32\u4e2d\u914d\u7f6e\u591a\u4e2a\u6570\u636e\u5e93\u5b9e\u4f8b<\/p>\n<p>connection_string = &#39;mysql+mysqlconnector:\/\/username:password@host1:3306,host2:3306\/database_name&#39;<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><h3>\u4e03\u3001\u603b\u7ed3<\/h3>\n<\/p>\n<p><p>Python\u8fde\u63a5\u6570\u636e\u5e93\u4e2d\u95f4\u4ef6\u7684\u65b9\u6cd5\u591a\u79cd\u591a\u6837\uff0c\u9009\u62e9\u5408\u9002\u7684\u5de5\u5177\u548c\u914d\u7f6e\u53ef\u4ee5\u5927\u5927\u7b80\u5316\u5f00\u53d1\u8fc7\u7a0b\uff0c\u63d0\u9ad8\u7cfb\u7edf\u7684\u53ef\u9760\u6027\u548c\u53ef\u6269\u5c55\u6027\u3002<strong>\u5b89\u88c5\u9002\u5f53\u7684\u6570\u636e\u5e93\u9a71\u52a8\u7a0b\u5e8f\u3001\u4f7f\u7528SQLAlchemy\u8fdb\u884cORM\u64cd\u4f5c\u3001\u5904\u7406\u6570\u636e\u5e93\u8fde\u63a5\u4e2d\u7684\u9519\u8bef\u3001\u4f18\u5316\u6570\u636e\u5e93\u8fde\u63a5\u6027\u80fd\u548c\u4f7f\u7528\u6570\u636e\u5e93\u4e2d\u95f4\u4ef6\u8fdb\u884c\u8d1f\u8f7d\u5747\u8861\u548c\u5bb9\u9519<\/strong>\uff0c\u90fd\u662f\u6210\u529f\u8fde\u63a5\u548c\u64cd\u4f5c\u6570\u636e\u5e93\u7684\u91cd\u8981\u6b65\u9aa4\u3002\u901a\u8fc7\u5b9e\u9645\u64cd\u4f5c\u548c\u4e0d\u65ad\u4f18\u5316\uff0c\u53ef\u4ee5\u66f4\u597d\u5730\u5229\u7528\u6570\u636e\u5e93\u4e2d\u95f4\u4ef6\u7684\u4f18\u52bf\uff0c\u4e3a\u5e94\u7528\u7a0b\u5e8f\u63d0\u4f9b\u9ad8\u6548\u3001\u7a33\u5b9a\u7684\u6570\u636e\u5e93\u670d\u52a1\u3002<\/p>\n<\/p>\n<h2><strong>\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n<p> <strong>\u5982\u4f55\u9009\u62e9\u5408\u9002\u7684\u6570\u636e\u5e93\u4e2d\u95f4\u4ef6\u6765\u8fde\u63a5Python\uff1f<\/strong><br \/>\u9009\u62e9\u5408\u9002\u7684\u6570\u636e\u5e93\u4e2d\u95f4\u4ef6\u9700\u8981\u8003\u8651\u591a\u4e2a\u56e0\u7d20\uff0c\u5305\u62ec\u652f\u6301\u7684\u6570\u636e\u5e93\u7c7b\u578b\u3001\u6027\u80fd\u3001\u6613\u7528\u6027\u4ee5\u53ca\u793e\u533a\u652f\u6301\u3002\u5e38\u7528\u7684\u4e2d\u95f4\u4ef6\u5982SQLAlchemy\u3001Django ORM\u7b49\uff0c\u80fd\u591f\u7b80\u5316\u6570\u636e\u5e93\u64cd\u4f5c\uff0c\u63d0\u4f9b\u66f4\u9ad8\u5c42\u6b21\u7684\u62bd\u8c61\uff0c\u9002\u5408\u4e0d\u540c\u7684\u9879\u76ee\u9700\u6c42\u3002\u5728\u9009\u62e9\u65f6\uff0c\u53ef\u4ee5\u5148\u4e86\u89e3\u5404\u4e2a\u4e2d\u95f4\u4ef6\u7684\u7279\u6027\uff0c\u5e76\u6839\u636e\u9879\u76ee\u7684\u590d\u6742\u5ea6\u548c\u56e2\u961f\u7684\u6280\u672f\u6808\u505a\u51fa\u51b3\u5b9a\u3002<\/p>\n<p><strong>Python\u8fde\u63a5\u6570\u636e\u5e93\u4e2d\u95f4\u4ef6\u65f6\u5e38\u89c1\u7684\u9519\u8bef\u6709\u54ea\u4e9b\uff1f<\/strong><br 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