{"id":97056,"date":"2024-10-20T14:38:17","date_gmt":"2024-10-20T06:38:17","guid":{"rendered":"https:\/\/server.hk\/cnblog\/97056\/"},"modified":"2024-10-20T14:38:17","modified_gmt":"2024-10-20T06:38:17","slug":"python%e4%b8%ad%e5%a6%82%e4%bd%95%e8%a8%aa%e5%95%8f%e6%95%b8%e6%93%9a%e5%ba%ab%e6%b8%b8%e6%a8%99%e5%b0%8d%e8%b1%a1%ef%bc%9f-%e5%88%b0%e6%95%b8%e6%93%9a%e5%ba%ab%e6%b8%b8%e6%a8%99%e5%b0%8d%e8%b1%a1","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/97056\/","title":{"rendered":"Python\u4e2d\u5982\u4f55\u8a2a\u554f\u6578\u64da\u5eab\u6e38\u6a19\u5c0d\u8c61\uff1f (\u5230\u6578\u64da\u5eab\u6e38\u6a19\u5c0d\u8c61)"},"content":{"rendered":"

Python\u4e2d\u5982\u4f55\u8a2a\u554f\u6578\u64da\u5eab\u6e38\u6a19\u5c0d\u8c61\uff1f<\/h1>\n

\u5728Python\u4e2d\uff0c\u6578\u64da\u5eab\u64cd\u4f5c\u901a\u5e38\u662f\u901a\u904e\u4f7f\u7528\u6e38\u6a19\u5c0d\u8c61\u4f86\u5be6\u73fe\u7684\u3002\u6e38\u6a19\u5c0d\u8c61\u662f\u7528\u4f86\u57f7\u884cSQL\u8a9e\u53e5\u4e26\u7372\u53d6\u7d50\u679c\u7684\u5de5\u5177\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e\u5982\u4f55\u5728Python\u4e2d\u8a2a\u554f\u6578\u64da\u5eab\u6e38\u6a19\u5c0d\u8c61\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u5be6\u7528\u7684\u793a\u4f8b\u548c\u4ee3\u78bc\u7247\u6bb5\u3002<\/p>\n

\u4ec0\u9ebc\u662f\u6e38\u6a19\u5c0d\u8c61\uff1f<\/h2>\n

\u6e38\u6a19\u5c0d\u8c61\u662f\u6578\u64da\u5eab\u9023\u63a5\u7684\u4e00\u90e8\u5206\uff0c\u5141\u8a31\u7528\u6236\u57f7\u884cSQL\u67e5\u8a62\u4e26\u7372\u53d6\u7d50\u679c\u3002\u5b83\u63d0\u4f9b\u4e86\u4e00\u500b\u63a5\u53e3\u4f86\u64cd\u4f5c\u6578\u64da\u5eab\u4e2d\u7684\u6578\u64da\uff0c\u4e26\u80fd\u5920\u9010\u884c\u6aa2\u7d22\u67e5\u8a62\u7d50\u679c\u3002\u6e38\u6a19\u5c0d\u8c61\u7684\u4f7f\u7528\u4f7f\u5f97\u6578\u64da\u5eab\u64cd\u4f5c\u8b8a\u5f97\u66f4\u52a0\u9748\u6d3b\u548c\u9ad8\u6548\u3002<\/p>\n

\u5982\u4f55\u5275\u5efa\u6e38\u6a19\u5c0d\u8c61<\/h2>\n

\u5728Python\u4e2d\uff0c\u4f7f\u7528`sqlite3`\u6a21\u584a\u6216\u5176\u4ed6\u6578\u64da\u5eab\u9a45\u52d5\uff08\u5982`MySQLdb`\u6216`psycopg2`\uff09\u4f86\u5275\u5efa\u6e38\u6a19\u5c0d\u8c61\u3002\u4ee5\u4e0b\u662f\u4f7f\u7528`sqlite3`\u6a21\u584a\u7684\u57fa\u672c\u6b65\u9a5f\uff1a<\/p>\n

import sqlite3\n\n# \u9023\u63a5\u5230\u6578\u64da\u5eab\nconnection = sqlite3.connect('example.db')\n\n# \u5275\u5efa\u6e38\u6a19\u5c0d\u8c61\ncursor = connection.cursor()\n<\/code><\/pre>\n
\u57f7\u884cSQL\u67e5\u8a62<\/h2>\n
\u4e00\u65e6\u5275\u5efa\u4e86\u6e38\u6a19\u5c0d\u8c61\uff0c\u5c31\u53ef\u4ee5\u4f7f\u7528\u5b83\u4f86\u57f7\u884cSQL\u67e5\u8a62\u3002\u4ee5\u4e0b\u662f\u57f7\u884c\u67e5\u8a62\u7684\u793a\u4f8b\uff1a<\/p>\n
# \u5275\u5efa\u4e00\u500b\u8868\ncursor.execute('''CREATE TABLE IF NOT EXISTS users (id INTEGER PRIMARY KEY, name TEXT)''')\n\n# \u63d2\u5165\u6578\u64da\ncursor.execute('''INSERT INTO users (name) VALUES ('Alice')''')\n\n# \u63d0\u4ea4\u66f4\u6539\nconnection.commit()\n<\/code><\/pre>\n
\u7372\u53d6\u67e5\u8a62\u7d50\u679c<\/h2>\n
\u57f7\u884c\u67e5\u8a62\u5f8c\uff0c\u53ef\u4ee5\u4f7f\u7528\u6e38\u6a19\u5c0d\u8c61\u4f86\u7372\u53d6\u7d50\u679c\u3002\u4ee5\u4e0b\u662f\u5982\u4f55\u6aa2\u7d22\u6578\u64da\u7684\u793a\u4f8b\uff1a<\/p>\n
# \u67e5\u8a62\u6578\u64da\ncursor.execute('''SELECT * FROM users''')\n\n# \u7372\u53d6\u6240\u6709\u7d50\u679c\nresults = cursor.fetchall()\n\n# \u8f38\u51fa\u7d50\u679c\nfor row in results:\n    print(row)\n<\/code><\/pre>\n
\u95dc\u9589\u6e38\u6a19\u548c\u9023\u63a5<\/h2>\n
\u5728\u5b8c\u6210\u6578\u64da\u5eab\u64cd\u4f5c\u5f8c\uff0c\u61c9\u8a72\u95dc\u9589\u6e38\u6a19\u548c\u9023\u63a5\u4ee5\u91cb\u653e\u8cc7\u6e90\u3002\u4ee5\u4e0b\u662f\u95dc\u9589\u6e38\u6a19\u548c\u9023\u63a5\u7684\u793a\u4f8b\uff1a<\/p>\n
# \u95dc\u9589\u6e38\u6a19\ncursor.close()\n\n# \u95dc\u9589\u9023\u63a5\nconnection.close()\n<\/code><\/pre>\n
\u932f\u8aa4\u8655\u7406<\/h2>\n
\u5728\u9032\u884c\u6578\u64da\u5eab\u64cd\u4f5c\u6642\uff0c\u932f\u8aa4\u8655\u7406\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002\u53ef\u4ee5\u4f7f\u7528`try-except`\u584a\u4f86\u6355\u7372\u548c\u8655\u7406\u7570\u5e38\u3002\u4ee5\u4e0b\u662f\u932f\u8aa4\u8655\u7406\u7684\u793a\u4f8b\uff1a<\/p>\n
try:\n    cursor.execute('''INSERT INTO users (name) VALUES ('Bob')''')\n    connection.commit()\nexcept sqlite3.Error as e:\n    print(f\"An error occurred: {e}\")\nfinally:\n    cursor.close()\n    connection.close()\n<\/code><\/pre>\n
\u7e3d\u7d50<\/h2>\n
\u5728Python\u4e2d\uff0c\u8a2a\u554f\u6578\u64da\u5eab\u6e38\u6a19\u5c0d\u8c61\u662f\u4e00\u500b\u7c21\u55ae\u800c\u6709\u6548\u7684\u904e\u7a0b\u3002\u901a\u904e\u5275\u5efa\u6e38\u6a19\u5c0d\u8c61\u3001\u57f7\u884cSQL\u67e5\u8a62\u3001\u7372\u53d6\u7d50\u679c\u4ee5\u53ca\u9069\u7576\u7684\u932f\u8aa4\u8655\u7406\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u8f15\u9b06\u5730\u8207\u6578\u64da\u5eab\u9032\u884c\u4ea4\u4e92\u3002\u7121\u8ad6\u662f\u4f7f\u7528`sqlite3`\u9084\u662f\u5176\u4ed6\u6578\u64da\u5eab\u9a45\u52d5\uff0c\u638c\u63e1\u6e38\u6a19\u5c0d\u8c61\u7684\u4f7f\u7528\u90fd\u662f\u9032\u884c\u6578\u64da\u5eab\u64cd\u4f5c\u7684\u57fa\u790e\u3002<\/p>\n
\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684 VPS<\/a> \u89e3\u6c7a\u65b9\u6848\u4f86\u652f\u6301\u60a8\u7684\u6578\u64da\u5eab\u61c9\u7528\uff0cServer.HK \u63d0\u4f9b\u4e86\u591a\u7a2e\u9078\u64c7\uff0c\u9069\u5408\u5404\u7a2e\u9700\u6c42\u3002\u7121\u8ad6\u662f \u9999\u6e2fVPS<\/a> \u9084\u662f\u5176\u4ed6\u670d\u52d9\uff0c\u6211\u5011\u90fd\u80fd\u70ba\u60a8\u63d0\u4f9b\u7a69\u5b9a\u7684\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u5b78\u7fd2\u5982\u4f55\u5728Python\u4e2d\u8a2a\u554f\u6578\u64da\u5eab\u6e38\u6a19\u5c0d\u8c61\uff0c\u638c\u63e1\u6578\u64da\u67e5\u8a62\u548c\u64cd\u4f5c\u7684\u57fa\u672c\u6280\u5de7\uff0c\u63d0\u5347\u6578\u64da\u5eab\u7ba1\u7406\u80fd\u529b\u3002<\/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-97056","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/97056","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=97056"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/97056\/revisions"}],"predecessor-version":[{"id":97057,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/97056\/revisions\/97057"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=97056"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=97056"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=97056"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}