{"id":97018,"date":"2024-10-20T14:18:16","date_gmt":"2024-10-20T06:18:16","guid":{"rendered":"https:\/\/server.hk\/cnblog\/97018\/"},"modified":"2024-10-20T14:18:17","modified_gmt":"2024-10-20T06:18:17","slug":"python%e8%bc%95%e9%ac%86%e5%88%aa%e9%99%a4%e6%95%b8%e6%93%9a%e5%ba%ab%ef%bc%8c%e5%bf%ab%e9%80%9f%e9%ab%98%e6%95%88%ef%bc%81-python%e8%87%aa%e5%8b%95%e5%8c%96%e5%88%aa%e9%99%a4%e6%95%b8%e6%93%9a","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/97018\/","title":{"rendered":"Python\u8f15\u9b06\u522a\u9664\u6578\u64da\u5eab\uff0c\u5feb\u901f\u9ad8\u6548\uff01 (python\u81ea\u52d5\u5316\u522a\u9664\u6578\u64da\u5eab)"},"content":{"rendered":"<h1 id=\"python%e8%bc%95%e9%ac%86%e5%88%aa%e9%99%a4%e6%95%b8%e6%93%9a%e5%ba%ab%ef%bc%8c%e5%bf%ab%e9%80%9f%e9%ab%98%e6%95%88%ef%bc%81-python%e8%87%aa%e5%8b%95%e5%8c%96%e5%88%aa%e9%99%a4%e6%95%b8%e6%93%9a-INvKlzWnfi\">Python\u8f15\u9b06\u522a\u9664\u6578\u64da\u5eab\uff0c\u5feb\u901f\u9ad8\u6548\uff01 (python\u81ea\u52d5\u5316\u522a\u9664\u6578\u64da\u5eab)<\/h1>\n<p>\u5728\u7576\u4eca\u7684\u6578\u64da\u9a45\u52d5\u4e16\u754c\u4e2d\uff0c\u6578\u64da\u5eab\u7684\u7ba1\u7406\u8b8a\u5f97\u8d8a\u4f86\u8d8a\u91cd\u8981\u3002\u7121\u8ad6\u662f\u958b\u767c\u8005\u9084\u662f\u6578\u64da\u79d1\u5b78\u5bb6\uff0c\u7d93\u5e38\u9700\u8981\u5c0d\u6578\u64da\u5eab\u9032\u884c\u64cd\u4f5c\uff0c\u5305\u62ec\u522a\u9664\u4e0d\u518d\u9700\u8981\u7684\u6578\u64da\u3002Python\u4f5c\u70ba\u4e00\u7a2e\u9ad8\u6548\u4e14\u6613\u65bc\u5b78\u7fd2\u7684\u7de8\u7a0b\u8a9e\u8a00\uff0c\u63d0\u4f9b\u4e86\u591a\u7a2e\u65b9\u6cd5\u4f86\u81ea\u52d5\u5316\u6578\u64da\u5eab\u7684\u522a\u9664\u64cd\u4f5c\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u4f7f\u7528Python\u8f15\u9b06\u5730\u522a\u9664\u6578\u64da\u5eab\u4e2d\u7684\u6578\u64da\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u5be6\u7528\u7684\u4ee3\u78bc\u793a\u4f8b\u3002<\/p>\n<h2 id=\"%e7%82%ba%e4%bb%80%e9%ba%bc%e9%81%b8%e6%93%87python%e9%80%b2%e8%a1%8c%e6%95%b8%e6%93%9a%e5%ba%ab%e6%93%8d%e4%bd%9c%ef%bc%9f-INvKlzWnfi\">\u70ba\u4ec0\u9ebc\u9078\u64c7Python\u9032\u884c\u6578\u64da\u5eab\u64cd\u4f5c\uff1f<\/h2>\n<p>Python\u64c1\u6709\u5f37\u5927\u7684\u5eab\u548c\u6846\u67b6\uff0c\u4f7f\u5f97\u6578\u64da\u5eab\u64cd\u4f5c\u8b8a\u5f97\u7c21\u55ae\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u9078\u64c7Python\u7684\u539f\u56e0\uff1a<\/p>\n<ul>\n<li><strong>\u6613\u65bc\u5b78\u7fd2\uff1a<\/strong>Python\u7684\u8a9e\u6cd5\u7c21\u55ae\u660e\u77ad\uff0c\u9069\u5408\u521d\u5b78\u8005\u3002<\/li>\n<li><strong>\u8c50\u5bcc\u7684\u5eab\uff1a<\/strong>\u5982SQLAlchemy\u3001Pandas\u7b49\u5eab\u53ef\u4ee5\u8f15\u9b06\u5730\u8207\u5404\u7a2e\u6578\u64da\u5eab\u9032\u884c\u4ea4\u4e92\u3002<\/li>\n<li><strong>\u81ea\u52d5\u5316\u80fd\u529b\uff1a<\/strong>Python\u53ef\u4ee5\u8f15\u9b06\u5730\u7de8\u5beb\u8173\u672c\u4f86\u81ea\u52d5\u5316\u91cd\u8907\u6027\u4efb\u52d9\u3002<\/li>\n<\/ul>\n<h2 id=\"%e4%bd%bf%e7%94%a8python%e5%88%aa%e9%99%a4%e6%95%b8%e6%93%9a%e5%ba%ab%e4%b8%ad%e7%9a%84%e6%95%b8%e6%93%9a-INvKlzWnfi\">\u4f7f\u7528Python\u522a\u9664\u6578\u64da\u5eab\u4e2d\u7684\u6578\u64da<\/h2>\n<p>\u5728\u958b\u59cb\u4e4b\u524d\uff0c\u78ba\u4fdd\u4f60\u5df2\u7d93\u5b89\u88dd\u4e86\u5fc5\u8981\u7684\u5eab\u3002\u4ee5\u4e0b\u662f\u4f7f\u7528SQLite\u6578\u64da\u5eab\u7684\u793a\u4f8b\uff0c\u56e0\u70ba\u5b83\u662f\u8f15\u91cf\u7d1a\u4e14\u6613\u65bc\u4f7f\u7528\u7684\u3002<\/p>\n<pre><code>pip install sqlite3<\/code><\/pre>\n<h3 id=\"%e9%80%a3%e6%8e%a5%e5%88%b0%e6%95%b8%e6%93%9a%e5%ba%ab-INvKlzWnfi\">\u9023\u63a5\u5230\u6578\u64da\u5eab<\/h3>\n<p>\u9996\u5148\uff0c\u6211\u5011\u9700\u8981\u9023\u63a5\u5230\u6578\u64da\u5eab\u3002\u4ee5\u4e0b\u662f\u9023\u63a5\u5230SQLite\u6578\u64da\u5eab\u7684\u4ee3\u78bc\uff1a<\/p>\n<pre><code>import sqlite3\n\n# \u9023\u63a5\u5230\u6578\u64da\u5eab\uff08\u5982\u679c\u4e0d\u5b58\u5728\u5247\u5275\u5efa\uff09\nconn = sqlite3.connect('example.db')\ncursor = conn.cursor()<\/code><\/pre>\n<h3 id=\"%e5%88%aa%e9%99%a4%e6%95%b8%e6%93%9a-INvKlzWnfi\">\u522a\u9664\u6578\u64da<\/h3>\n<p>\u4e00\u65e6\u9023\u63a5\u6210\u529f\uff0c\u6211\u5011\u53ef\u4ee5\u4f7f\u7528SQL\u8a9e\u53e5\u522a\u9664\u6578\u64da\u3002\u4ee5\u4e0b\u662f\u522a\u9664\u7279\u5b9a\u689d\u4ef6\u4e0b\u6578\u64da\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code># \u522a\u9664\u5e74\u9f61\u5927\u65bc30\u7684\u7528\u6236\ncursor.execute(\"DELETE FROM users WHERE age &gt; 30\")\n\n# \u63d0\u4ea4\u66f4\u6539\nconn.commit()<\/code><\/pre>\n<h3 id=\"%e9%97%9c%e9%96%89%e9%80%a3%e6%8e%a5-INvKlzWnfi\">\u95dc\u9589\u9023\u63a5<\/h3>\n<p>\u5b8c\u6210\u64cd\u4f5c\u5f8c\uff0c\u8a18\u5f97\u95dc\u9589\u6578\u64da\u5eab\u9023\u63a5\uff1a<\/p>\n<pre><code>conn.close()<\/code><\/pre>\n<h2 id=\"%e4%bd%bf%e7%94%a8orm%e9%80%b2%e8%a1%8c%e6%95%b8%e6%93%9a%e5%88%aa%e9%99%a4-INvKlzWnfi\">\u4f7f\u7528ORM\u9032\u884c\u6578\u64da\u522a\u9664<\/h2>\n<p>\u9664\u4e86\u76f4\u63a5\u4f7f\u7528SQL\u8a9e\u53e5\uff0c\u9084\u53ef\u4ee5\u4f7f\u7528ORM\uff08\u5c0d\u8c61\u95dc\u4fc2\u6620\u5c04\uff09\u4f86\u9032\u884c\u6578\u64da\u5eab\u64cd\u4f5c\u3002SQLAlchemy\u662f\u4e00\u500b\u6d41\u884c\u7684ORM\u5eab\uff0c\u4ee5\u4e0b\u662f\u4f7f\u7528SQLAlchemy\u522a\u9664\u6578\u64da\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>from sqlalchemy import create_engine, Column, Integer, String\nfrom sqlalchemy.ext.declarative import declarative_base\nfrom sqlalchemy.orm import sessionmaker\n\n# \u5275\u5efa\u6578\u64da\u5eab\u5f15\u64ce\nengine = create_engine('sqlite:\/\/\/example.db')\nBase = declarative_base()\n\n# \u5b9a\u7fa9\u7528\u6236\u6a21\u578b\nclass User(Base):\n    __tablename__ = 'users'\n    id = Column(Integer, primary_key=True)\n    name = Column(String)\n    age = Column(Integer)\n\n# \u5275\u5efa\u6703\u8a71\nSession = sessionmaker(bind=engine)\nsession = Session()\n\n# \u522a\u9664\u5e74\u9f61\u5927\u65bc30\u7684\u7528\u6236\nsession.query(User).filter(User.age &gt; 30).delete()\n\n# \u63d0\u4ea4\u66f4\u6539\nsession.commit()\n\n# \u95dc\u9589\u6703\u8a71\nsession.close()<\/code><\/pre>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-INvKlzWnfi\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<p>\u5728\u522a\u9664\u6578\u64da\u6642\uff0c\u8acb\u52d9\u5fc5\u5c0f\u5fc3\uff0c\u56e0\u70ba\u9019\u662f\u4e00\u500b\u4e0d\u53ef\u9006\u7684\u64cd\u4f5c\u3002\u5efa\u8b70\u5728\u522a\u9664\u4e4b\u524d\u5099\u4efd\u6578\u64da\u5eab\uff0c\u4ee5\u9632\u6b62\u610f\u5916\u4e1f\u5931\u91cd\u8981\u6578\u64da\u3002\u6b64\u5916\uff0c\u4f7f\u7528\u4e8b\u52d9\u4f86\u78ba\u4fdd\u6578\u64da\u7684\u4e00\u81f4\u6027\u548c\u5b8c\u6574\u6027\u4e5f\u662f\u4e00\u500b\u597d\u7fd2\u6163\u3002<\/p>\n<h2 id=\"%e7%b8%bd%e7%b5%90-INvKlzWnfi\">\u7e3d\u7d50<\/h2>\n<p>\u4f7f\u7528Python\u9032\u884c\u6578\u64da\u5eab\u7684\u81ea\u52d5\u5316\u522a\u9664\u64cd\u4f5c\u4e0d\u50c5\u9ad8\u6548\uff0c\u800c\u4e14\u7c21\u55ae\u6613\u884c\u3002\u7121\u8ad6\u662f\u4f7f\u7528\u539f\u751fSQL\u9084\u662fORM\uff0cPython\u90fd\u80fd\u5920\u5e6b\u52a9\u958b\u767c\u8005\u5feb\u901f\u5b8c\u6210\u4efb\u52d9\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u7ba1\u7406\u6578\u64da\u7684\u4f01\u696d\u4f86\u8aaa\uff0c\u9078\u64c7\u5408\u9069\u7684\u6578\u64da\u5eab\u548c\u5de5\u5177\u81f3\u95dc\u91cd\u8981\u3002\u5982\u679c\u4f60\u6b63\u5728\u5c0b\u627e\u7a69\u5b9a\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\u4f86\u904b\u884c\u4f60\u7684\u6578\u64da\u5eab\uff0cServer.HK\u63d0\u4f9b\u4e86\u591a\u7a2e\u9078\u64c7\uff0c\u6eff\u8db3\u4e0d\u540c\u9700\u6c42\u7684\u7528\u6236\u3002\u7121\u8ad6\u662f <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u9084\u662f\u5176\u4ed6\u670d\u52d9\uff0cServer.HK\u90fd\u80fd\u70ba\u4f60\u63d0\u4f9b\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u8f15\u9b06\u4f7f\u7528Python\u81ea\u52d5\u5316\u522a\u9664\u6578\u64da\u5eab\uff0c\u5feb\u901f\u9ad8\u6548\uff0c\u8b93\u6578\u64da\u7ba1\u7406\u8b8a\u5f97\u7c21\u55ae\u7121\u6bd4\uff01<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-97018","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/97018","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=97018"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/97018\/revisions"}],"predecessor-version":[{"id":97019,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/97018\/revisions\/97019"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=97018"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=97018"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=97018"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}