{"id":97058,"date":"2024-10-20T14:39:18","date_gmt":"2024-10-20T06:39:18","guid":{"rendered":"https:\/\/server.hk\/cnblog\/97058\/"},"modified":"2024-10-20T14:39:19","modified_gmt":"2024-10-20T06:39:19","slug":"python%e4%b8%ad%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8list%e5%8f%96%e5%87%ba%e9%a1%9e%e4%b8%ad%e7%9a%84%e6%95%b8%e6%93%9a%e5%ba%ab%e6%95%b8%e6%93%9a%ef%bc%9f-list%e5%8f%96%e5%87%ba%e9%a1%9e%e4%b8%ad","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/97058\/","title":{"rendered":"Python\u4e2d\u5982\u4f55\u4f7f\u7528list\u53d6\u51fa\u985e\u4e2d\u7684\u6578\u64da\u5eab\u6578\u64da\uff1f (list\u53d6\u51fa\u985e\u4e2d\u6578\u64da\u5eab)"},"content":{"rendered":"

Python\u4e2d\u5982\u4f55\u4f7f\u7528list\u53d6\u51fa\u985e\u4e2d\u7684\u6578\u64da\u5eab\u6578\u64da\uff1f<\/h1>\n

\u5728\u73fe\u4ee3\u7684\u61c9\u7528\u958b\u767c\u4e2d\uff0cPython\u4f5c\u70ba\u4e00\u7a2e\u9ad8\u6548\u4e14\u6613\u65bc\u5b78\u7fd2\u7684\u7de8\u7a0b\u8a9e\u8a00\uff0c\u5ee3\u6cdb\u61c9\u7528\u65bc\u6578\u64da\u8655\u7406\u548c\u6578\u64da\u5eab\u64cd\u4f5c\u3002\u7576\u6211\u5011\u9700\u8981\u5f9e\u6578\u64da\u5eab\u4e2d\u63d0\u53d6\u6578\u64da\u4e26\u5c07\u5176\u5b58\u5132\u5728\u5217\u8868\u4e2d\u6642\uff0c\u4e86\u89e3\u5982\u4f55\u6709\u6548\u5730\u4f7f\u7528Python\u7684\u5217\u8868\uff08list\uff09\u7d50\u69cb\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u5728Python\u4e2d\u4f7f\u7528\u5217\u8868\u4f86\u63d0\u53d6\u985e\u4e2d\u7684\u6578\u64da\u5eab\u6578\u64da\u3002<\/p>\n

1. \u74b0\u5883\u6e96\u5099<\/h2>\n

\u5728\u958b\u59cb\u4e4b\u524d\uff0c\u78ba\u4fdd\u4f60\u5df2\u7d93\u5b89\u88dd\u4e86\u5fc5\u8981\u7684\u5eab\u3002\u901a\u5e38\uff0c\u6211\u5011\u6703\u4f7f\u7528 sqlite3<\/code> \u6216 SQLAlchemy<\/code> \u4f86\u8207\u6578\u64da\u5eab\u9032\u884c\u4ea4\u4e92\u3002\u4ee5\u4e0b\u662f\u5b89\u88dd SQLAlchemy<\/code> \u7684\u547d\u4ee4\uff1a<\/p>\n

pip install SQLAlchemy<\/code><\/pre>\n
2. \u9023\u63a5\u6578\u64da\u5eab<\/h2>\n
\u9996\u5148\uff0c\u6211\u5011\u9700\u8981\u9023\u63a5\u5230\u6578\u64da\u5eab\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u4f7f\u7528 SQLAlchemy<\/code> \u9023\u63a5\u5230SQLite\u6578\u64da\u5eab\u7684\u793a\u4f8b\uff1a<\/p>\n
from sqlalchemy import create_engine\n\n# \u5275\u5efa\u6578\u64da\u5eab\u5f15\u64ce\nengine = create_engine('sqlite:\/\/\/example.db')\n<\/code><\/pre>\n
3. \u5b9a\u7fa9\u6578\u64da\u6a21\u578b<\/h2>\n
\u63a5\u4e0b\u4f86\uff0c\u6211\u5011\u9700\u8981\u5b9a\u7fa9\u4e00\u500b\u6578\u64da\u6a21\u578b\u3002\u9019\u88e1\u6211\u5011\u5c07\u5275\u5efa\u4e00\u500b\u7c21\u55ae\u7684\u7528\u6236\u985e\uff1a<\/p>\n
from sqlalchemy.ext.declarative import declarative_base\nfrom sqlalchemy import Column, Integer, String\n\nBase = declarative_base()\n\nclass User(Base):\n    __tablename__ = 'users'\n    \n    id = Column(Integer, primary_key=True)\n    name = Column(String)\n    age = Column(Integer)\n<\/code><\/pre>\n
4. \u63d0\u53d6\u6578\u64da\u4e26\u5b58\u5132\u5728\u5217\u8868\u4e2d<\/h2>\n
\u73fe\u5728\uff0c\u6211\u5011\u53ef\u4ee5\u5f9e\u6578\u64da\u5eab\u4e2d\u63d0\u53d6\u6578\u64da\u4e26\u5c07\u5176\u5b58\u5132\u5728\u5217\u8868\u4e2d\u3002\u4ee5\u4e0b\u662f\u5982\u4f55\u5be6\u73fe\u7684\uff1a<\/p>\n
from sqlalchemy.orm import sessionmaker\n\n# \u5275\u5efa\u6703\u8a71\nSession = sessionmaker(bind=engine)\nsession = Session()\n\n# \u67e5\u8a62\u6240\u6709\u7528\u6236\nusers = session.query(User).all()\n\n# \u5c07\u7528\u6236\u6578\u64da\u5b58\u5132\u5728\u5217\u8868\u4e2d\nuser_list = []\nfor user in users:\n    user_list.append({'id': user.id, 'name': user.name, 'age': user.age})\n\n# \u8f38\u51fa\u7528\u6236\u5217\u8868\nprint(user_list)\n<\/code><\/pre>\n
\u5728\u9019\u6bb5\u4ee3\u78bc\u4e2d\uff0c\u6211\u5011\u9996\u5148\u5275\u5efa\u4e86\u4e00\u500b\u6703\u8a71\uff0c\u7136\u5f8c\u67e5\u8a62\u6240\u6709\u7528\u6236\u3002\u63a5\u8457\uff0c\u6211\u5011\u4f7f\u7528\u4e00\u500b\u5faa\u74b0\u5c07\u6bcf\u500b\u7528\u6236\u7684\u6578\u64da\u5b58\u5132\u5728\u4e00\u500b\u5b57\u5178\u4e2d\uff0c\u4e26\u5c07\u9019\u4e9b\u5b57\u5178\u6dfb\u52a0\u5230\u5217\u8868\u4e2d\u3002\u6700\u5f8c\uff0c\u6211\u5011\u6253\u5370\u51fa\u9019\u500b\u5217\u8868\u3002<\/p>\n
5. \u5c0f\u7d50<\/h2>\n
\u901a\u904e\u4e0a\u8ff0\u6b65\u9a5f\uff0c\u6211\u5011\u53ef\u4ee5\u8f15\u9b06\u5730\u5f9e\u6578\u64da\u5eab\u4e2d\u63d0\u53d6\u6578\u64da\u4e26\u5c07\u5176\u5b58\u5132\u5728Python\u7684\u5217\u8868\u4e2d\u3002\u9019\u7a2e\u65b9\u6cd5\u4e0d\u50c5\u7c21\u55ae\u660e\u4e86\uff0c\u9084\u80fd\u6709\u6548\u5730\u7ba1\u7406\u548c\u64cd\u4f5c\u6578\u64da\u3002\u7121\u8ad6\u662f\u7528\u65bc\u6578\u64da\u5206\u6790\u9084\u662f\u61c9\u7528\u958b\u767c\uff0c\u638c\u63e1\u9019\u7a2e\u6280\u8853\u90fd\u662f\u975e\u5e38\u6709\u7528\u7684\u3002<\/p>\n
\u7e3d\u7d50<\/h2>\n
\u5728\u672c\u6587\u4e2d\uff0c\u6211\u5011\u63a2\u8a0e\u4e86\u5982\u4f55\u5728Python\u4e2d\u4f7f\u7528\u5217\u8868\u4f86\u63d0\u53d6\u985e\u4e2d\u7684\u6578\u64da\u5eab\u6578\u64da\u3002\u901a\u904e\u4f7f\u7528 SQLAlchemy<\/code>\uff0c\u6211\u5011\u80fd\u5920\u8f15\u9b06\u5730\u9023\u63a5\u6578\u64da\u5eab\u3001\u5b9a\u7fa9\u6578\u64da\u6a21\u578b\u4e26\u63d0\u53d6\u6578\u64da\u3002\u9019\u4e9b\u6280\u80fd\u5c0d\u65bc\u958b\u767c\u6578\u64da\u9a45\u52d5\u7684\u61c9\u7528\u7a0b\u5e8f\u81f3\u95dc\u91cd\u8981\u3002\u5982\u679c\u4f60\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684 VPS<\/a> \u89e3\u6c7a\u65b9\u6848\u4f86\u904b\u884c\u4f60\u7684\u61c9\u7528\uff0cServer.HK \u63d0\u4f9b\u4e86\u591a\u7a2e\u9078\u64c7\uff0c\u5e6b\u52a9\u4f60\u8f15\u9b06\u7ba1\u7406\u4f60\u7684\u6578\u64da\u5eab\u548c\u61c9\u7528\u7a0b\u5e8f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u4e86\u89e3\u5982\u4f55\u5728Python\u4e2d\u4f7f\u7528\u5217\u8868\u63d0\u53d6\u7c7b\u4e2d\u7684\u6570\u636e\u5e93\u6570\u636e\uff0c\u7b80\u5316\u6570\u636e\u5904\u7406\u4e0e\u7ba1\u7406\uff0c\u63d0\u9ad8\u7f16\u7a0b\u6548\u7387\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-97058","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/97058","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=97058"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/97058\/revisions"}],"predecessor-version":[{"id":97059,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/97058\/revisions\/97059"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=97058"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=97058"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=97058"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}