{"id":2839,"date":"2025-03-16T12:23:20","date_gmt":"2025-03-16T04:23:20","guid":{"rendered":"https:\/\/www.laixuexila.com\/?p=2839"},"modified":"2025-03-16T12:23:20","modified_gmt":"2025-03-16T04:23:20","slug":"python3-%e7%bd%91%e7%bb%9c%e7%bc%96%e7%a8%8b10%ef%bc%9a%e9%ab%98%e6%95%88%e7%9a%84%e5%bc%82%e6%ad%a5%e6%95%b0%e6%8d%ae%e5%ba%93%e6%93%8d%e4%bd%9c","status":"publish","type":"post","link":"https:\/\/www.laixuexila.com\/index.php\/2025\/03\/16\/python3-%e7%bd%91%e7%bb%9c%e7%bc%96%e7%a8%8b10%ef%bc%9a%e9%ab%98%e6%95%88%e7%9a%84%e5%bc%82%e6%ad%a5%e6%95%b0%e6%8d%ae%e5%ba%93%e6%93%8d%e4%bd%9c\/","title":{"rendered":"Python3 \u7f51\u7edc\u7f16\u7a0b10\uff1a\u9ad8\u6548\u7684\u5f02\u6b65\u6570\u636e\u5e93\u64cd\u4f5c"},"content":{"rendered":"\n<p>\u5728\u6784\u5efa\u9ad8\u6027\u80fd\u7684\u5e94\u7528\u65f6\uff0c\u6570\u636e\u5e93\u64cd\u4f5c\u7684\u6027\u80fd\u5f80\u5f80\u662f\u74f6\u9888\u4e4b\u4e00\u3002\u901a\u8fc7\u5f02\u6b65\u6570\u636e\u5e93\u64cd\u4f5c\uff0c\u53ef\u4ee5\u5927\u5e45\u63d0\u9ad8\u5e76\u53d1\u8bf7\u6c42\u7684\u5904\u7406\u80fd\u529b\u3002\u6211\u4eec\u5c06\u4ecb\u7ecd\u5982\u4f55\u5728\u5f02\u6b65\u7f16\u7a0b\u4e2d\u5904\u7406\u6570\u636e\u5e93\u64cd\u4f5c\uff0c\u91cd\u70b9\u4ecb\u7ecd\u5982\u4f55\u4f7f\u7528 <code>asyncio<\/code> \u548c\u5f02\u6b65\u6570\u636e\u5e93\u5e93\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>10.1 \u4f7f\u7528 <code>aiomysql<\/code> \u8fdb\u884c MySQL \u5f02\u6b65\u64cd\u4f5c<\/strong><\/h2>\n\n\n\n<p><code>aiomysql<\/code> \u662f\u4e00\u4e2a\u4e0e <code>asyncio<\/code> \u517c\u5bb9\u7684 MySQL \u5ba2\u6237\u7aef\u5e93\uff0c\u53ef\u4ee5\u5b9e\u73b0\u5f02\u6b65\u6570\u636e\u5e93\u8fde\u63a5\u3001\u67e5\u8be2\u548c\u4e8b\u52a1\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>10.1.1 \u5b89\u88c5 <code>aiomysql<\/code><\/strong><\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>pip install aiomysql<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>10.1.2 \u5f02\u6b65\u8fde\u63a5\u6570\u636e\u5e93<\/strong><\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>import aiomysql\nimport asyncio\n\nasync def test_connection():\n    # \u521b\u5efa\u6570\u636e\u5e93\u8fde\u63a5\u6c60\n    pool = await aiomysql.create_pool(\n        host='localhost', port=3306,\n        user='root', password='password',\n        db='testdb', loop=loop\n    )\n    async with pool.acquire() as conn:\n        async with conn.cursor() as cursor:\n            await cursor.execute(\"SELECT VERSION()\")\n            version = await cursor.fetchone()\n            print(\"Database version:\", version)\n\nloop = asyncio.get_event_loop()\nloop.run_until_complete(test_connection())<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>10.1.3 \u5f02\u6b65\u6267\u884c\u67e5\u8be2<\/strong><\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>async def execute_query():\n    pool = await aiomysql.create_pool(\n        host='localhost', port=3306,\n        user='root', password='password',\n        db='testdb', loop=loop\n    )\n    async with pool.acquire() as conn:\n        async with conn.cursor() as cursor:\n            await cursor.execute(\"SELECT * FROM users\")\n            result = await cursor.fetchall()\n            print(\"Query result:\", result)\n\nloop.run_until_complete(execute_query())<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>10.2 \u4f7f\u7528 <code>asyncpg<\/code> \u8fdb\u884c PostgreSQL \u5f02\u6b65\u64cd\u4f5c<\/strong><\/h2>\n\n\n\n<p><code>asyncpg<\/code> \u662f\u4e00\u4e2a\u9ad8\u6027\u80fd\u7684 PostgreSQL \u5ba2\u6237\u7aef\u5e93\uff0c\u652f\u6301\u5f02\u6b65\u6570\u636e\u5e93\u64cd\u4f5c\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>10.2.1 \u5b89\u88c5 <code>asyncpg<\/code><\/strong><\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>pip install asyncpg<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>10.2.2 \u5f02\u6b65\u8fde\u63a5 PostgreSQL<\/strong><\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>import asyncpg\nimport asyncio\n\nasync def test_connection():\n    conn = await asyncpg.connect(user='postgres', password='password', database='testdb', host='127.0.0.1')\n    version = await conn.fetch('SELECT version()')\n    print(\"Database version:\", version)\n    await conn.close()\n\nloop = asyncio.get_event_loop()\nloop.run_until_complete(test_connection())<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>10.2.3 \u5f02\u6b65\u6267\u884c\u67e5\u8be2<\/strong><\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>async def execute_query():\n    conn = await asyncpg.connect(user='postgres', password='password', database='testdb', host='127.0.0.1')\n    result = await conn.fetch('SELECT * FROM users')\n    print(\"Query result:\", result)\n    await conn.close()\n\nloop.run_until_complete(execute_query())<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>10.3 \u5f02\u6b65\u4e8b\u52a1\u64cd\u4f5c<\/strong><\/h2>\n\n\n\n<p>\u6570\u636e\u5e93\u4e8b\u52a1\u5728\u591a\u6b65\u9aa4\u64cd\u4f5c\u4e2d\u975e\u5e38\u91cd\u8981\u3002\u5f02\u6b65\u4e8b\u52a1\u5141\u8bb8\u6211\u4eec\u5728\u6267\u884c\u591a\u4e2a\u6570\u636e\u5e93\u64cd\u4f5c\u65f6\u4fdd\u6301\u975e\u963b\u585e\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>10.3.1 \u4f7f\u7528 <code>aiomysql<\/code> \u6267\u884c\u5f02\u6b65\u4e8b\u52a1<\/strong><\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>async def execute_transaction():\n    pool = await aiomysql.create_pool(\n        host='localhost', port=3306,\n        user='root', password='password',\n        db='testdb', loop=loop\n    )\n    async with pool.acquire() as conn:\n        async with conn.cursor() as cursor:\n            await conn.begin()  # \u5f00\u59cb\u4e8b\u52a1\n            try:\n                await cursor.execute(\"UPDATE users SET balance = balance - 100 WHERE id = 1\")\n                await cursor.execute(\"UPDATE users SET balance = balance + 100 WHERE id = 2\")\n                await conn.commit()  # \u63d0\u4ea4\u4e8b\u52a1\n                print(\"\u4e8b\u52a1\u63d0\u4ea4\u6210\u529f\")\n            except Exception as e:\n                await conn.rollback()  # \u53d1\u751f\u5f02\u5e38\u65f6\u56de\u6eda\u4e8b\u52a1\n                print(\"\u4e8b\u52a1\u56de\u6eda:\", e)\n\nloop.run_until_complete(execute_transaction())<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>10.3.2 \u4f7f\u7528 <code>asyncpg<\/code> \u6267\u884c\u5f02\u6b65\u4e8b\u52a1<\/strong><\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>async def execute_transaction():\n    conn = await asyncpg.connect(user='postgres', password='password', database='testdb', host='127.0.0.1')\n    async with conn.transaction():  # \u4f7f\u7528\u4e8b\u52a1\n        try:\n            await conn.execute(\"UPDATE users SET balance = balance - 100 WHERE id = 1\")\n            await conn.execute(\"UPDATE users SET balance = balance + 100 WHERE id = 2\")\n            print(\"\u4e8b\u52a1\u63d0\u4ea4\u6210\u529f\")\n        except Exception as e:\n            print(\"\u4e8b\u52a1\u56de\u6eda:\", e)\n    await conn.close()\n\nloop.run_until_complete(execute_transaction())<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>10.4 \u5f02\u6b65\u6570\u636e\u5e93\u8fde\u63a5\u6c60<\/strong><\/h2>\n\n\n\n<p>\u4f7f\u7528\u8fde\u63a5\u6c60\u53ef\u4ee5\u7ba1\u7406\u591a\u4e2a\u6570\u636e\u5e93\u8fde\u63a5\uff0c\u907f\u514d\u9891\u7e41\u521b\u5efa\u548c\u9500\u6bc1\u8fde\u63a5\uff0c\u63d0\u9ad8\u6570\u636e\u5e93\u8bbf\u95ee\u6548\u7387\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>10.4.1 \u4f7f\u7528 <code>aiomysql<\/code> \u8fde\u63a5\u6c60<\/strong><\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>async def execute_with_pool():\n    pool = await aiomysql.create_pool(\n        host='localhost', port=3306,\n        user='root', password='password',\n        db='testdb', loop=loop\n    )\n    async with pool.acquire() as conn:\n        async with conn.cursor() as cursor:\n            await cursor.execute(\"SELECT * FROM users\")\n            result = await cursor.fetchall()\n            print(\"Query result:\", result)\n\nloop.run_until_complete(execute_with_pool())<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>10.4.2 \u4f7f\u7528 <code>asyncpg<\/code> \u8fde\u63a5\u6c60<\/strong><\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>async def execute_with_pool():\n    conn = await asyncpg.create_pool(user='postgres', password='password', database='testdb', host='127.0.0.1')\n    async with conn.acquire() as connection:\n        result = await connection.fetch('SELECT * FROM users')\n        print(\"Query result:\", result)\n\nloop.run_until_complete(execute_with_pool())<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>10.5 \u6027\u80fd\u4f18\u5316\u4e0e\u5f02\u6b65\u6570\u636e\u5e93\u64cd\u4f5c<\/strong><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u6279\u91cf\u64cd\u4f5c<\/strong>\uff1a\u5bf9\u4e8e\u5927\u89c4\u6a21\u7684\u6570\u636e\u5e93\u67e5\u8be2\uff0c\u91c7\u7528\u6279\u91cf\u64cd\u4f5c\u800c\u4e0d\u662f\u5355\u6b21\u6267\u884c\u591a\u4e2a\u67e5\u8be2\uff0c\u8fd9\u6837\u53ef\u4ee5\u51cf\u5c11\u7f51\u7edc\u5ef6\u8fdf\u3002<\/li>\n\n\n\n<li><strong>\u8fde\u63a5\u6c60<\/strong>\uff1a\u4f7f\u7528\u8fde\u63a5\u6c60\u6765\u7ba1\u7406\u6570\u636e\u5e93\u8fde\u63a5\uff0c\u907f\u514d\u6bcf\u6b21\u8bf7\u6c42\u90fd\u91cd\u65b0\u521b\u5efa\u8fde\u63a5\u3002<\/li>\n\n\n\n<li><strong>\u5e76\u53d1\u67e5\u8be2<\/strong>\uff1a\u5229\u7528 <code>asyncio.gather()<\/code> \u6216\u7c7b\u4f3c\u65b9\u6cd5\u540c\u65f6\u6267\u884c\u591a\u4e2a\u6570\u636e\u5e93\u67e5\u8be2\uff0c\u4ee5\u63d0\u9ad8\u541e\u5410\u91cf\u3002<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>10.5.1 \u6279\u91cf\u63d2\u5165\u64cd\u4f5c<\/strong><\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>async def bulk_insert():\n    conn = await asyncpg.connect(user='postgres', password='password', database='testdb', host='127.0.0.1')\n    await conn.executemany(\n        'INSERT INTO users(name, balance) VALUES($1, $2)',\n        &#91;('Alice', 1000), ('Bob', 2000), ('Charlie', 1500)]\n    )\n    print(\"\u6279\u91cf\u63d2\u5165\u6210\u529f\")\n    await conn.close()\n\nloop.run_until_complete(bulk_insert())<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>10.5.2 \u5e76\u53d1\u67e5\u8be2<\/strong><\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>async def concurrent_queries():\n    conn = await asyncpg.connect(user='postgres', password='password', database='testdb', host='127.0.0.1')\n    query1 = conn.fetch('SELECT * FROM users WHERE id=1')\n    query2 = conn.fetch('SELECT * FROM users WHERE id=2')\n    result1, result2 = await asyncio.gather(query1, query2)\n    print(f\"\u67e5\u8be2\u7ed3\u679c1: {result1}, \u67e5\u8be2\u7ed3\u679c2: {result2}\")\n    await conn.close()\n\nloop.run_until_complete(concurrent_queries())<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p><strong>\u603b\u7ed3<\/strong>\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5f02\u6b65\u6570\u636e\u5e93\u64cd\u4f5c\u80fd\u591f\u663e\u8457\u63d0\u9ad8\u5e94\u7528\u7684\u5e76\u53d1\u5904\u7406\u80fd\u529b\uff0c\u51cf\u5c11 I\/O \u963b\u585e\u3002<\/li>\n\n\n\n<li>\u4f7f\u7528 <code>aiomysql<\/code> \u548c <code>asyncpg<\/code> \u7b49\u5e93\uff0c\u6211\u4eec\u53ef\u4ee5\u65b9\u4fbf\u5730\u8fdb\u884c\u5f02\u6b65 MySQL \u548c PostgreSQL \u64cd\u4f5c\u3002<\/li>\n\n\n\n<li>\u5f02\u6b65\u4e8b\u52a1\u548c\u8fde\u63a5\u6c60\u80fd\u591f\u8fdb\u4e00\u6b65\u63d0\u9ad8\u64cd\u4f5c\u6548\u7387\u548c\u7a33\u5b9a\u6027\uff0c\u9002\u7528\u4e8e\u9ad8\u5e76\u53d1\u573a\u666f\u3002<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p><strong>\u4e0b\u7bc7\u6587\u7ae0\u6211\u4eec\u5c06\u8ba8\u8bba\u5982\u4f55\u6784\u5efa\u5f02\u6b65\u6587\u4ef6\u5904\u7406\u7cfb\u7edf\uff01<\/strong> <\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728\u6784\u5efa\u9ad8\u6027\u80fd\u7684\u5e94\u7528\u65f6\uff0c\u6570\u636e\u5e93\u64cd\u4f5c\u7684\u6027\u80fd\u5f80\u5f80\u662f\u74f6\u9888\u4e4b\u4e00\u3002\u901a\u8fc7\u5f02\u6b65\u6570\u636e\u5e93\u64cd\u4f5c\uff0c\u53ef\u4ee5\u5927\u5e45\u63d0\u9ad8\u5e76\u53d1\u8bf7\u6c42\u7684\u5904\u7406\u80fd\u529b\u3002\u6211\u4eec [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":2840,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[79],"tags":[],"class_list":["post-2839","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-python-3-"],"_links":{"self":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/2839","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/comments?post=2839"}],"version-history":[{"count":1,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/2839\/revisions"}],"predecessor-version":[{"id":2841,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/2839\/revisions\/2841"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/media\/2840"}],"wp:attachment":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/media?parent=2839"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/categories?post=2839"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/tags?post=2839"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}