import mysql.connector<\/p>\nconn = mysql.connector.connect(<\/p>\n
host='localhost',<\/p>\n
user='username',<\/p>\n
password='password',<\/p>\n
database='database_name'<\/p>\n
)<\/p>\n
cursor = conn.cursor()<\/p>\n
cursor.execute('SELECT * FROM table_name')<\/p>\n
for row in cursor.fetchall():<\/p>\n
print(row)<\/p>\n
conn.close()<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u6211\u4eec\u8fde\u63a5\u5230\u672c\u5730MySQL\u6570\u636e\u5e93\uff0c\u5e76\u6267\u884c\u4e00\u4e2a\u7b80\u5355\u7684SELECT\u67e5\u8be2\u6765\u83b7\u53d6\u6570\u636e\u3002<\/p>\n<\/p>\n
3.2 \u8fde\u63a5SQLite\u6570\u636e\u5e93<\/h4>\n<\/p>\n
SQLite\u662f\u4e00\u79cd\u8f7b\u91cf\u7ea7\u6570\u636e\u5e93\uff0c\u5e38\u7528\u4e8e\u5c0f\u578b\u5e94\u7528\u548c\u6d4b\u8bd5\u73af\u5883\u3002Python\u5185\u7f6e\u652f\u6301SQLite\uff0c\u65e0\u9700\u989d\u5916\u5b89\u88c5\u5e93\u3002<\/p>\n<\/p>\n
import sqlite3<\/p>\nconn = sqlite3.connect('database.db')<\/p>\n
cursor = conn.cursor()<\/p>\n
cursor.execute('SELECT * FROM table_name')<\/p>\n
for row in cursor.fetchall():<\/p>\n
print(row)<\/p>\n
conn.close()<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8fd9\u91cc\u6211\u4eec\u8fde\u63a5\u5230\u4e00\u4e2aSQLite\u6570\u636e\u5e93\uff0c\u5e76\u6267\u884c\u4e00\u4e2aSELECT\u67e5\u8be2\u6765\u83b7\u53d6\u6570\u636e\u3002<\/p>\n<\/p>\n
\u56db\u3001\u4f7f\u7528\u7f51\u7edc\u722c\u866b<\/h3>\n<\/p>\n
\u7f51\u7edc\u722c\u866b\u662f\u4e00\u79cd\u81ea\u52a8\u5316\u7a0b\u5e8f\uff0c\u7528\u4e8e\u4ece\u7f51\u7ad9\u63d0\u53d6\u6570\u636e\u3002Python\u7684BeautifulSoup<\/code>\u548cScrapy<\/code>\u5e93\u662f\u6700\u5e38\u7528\u7684\u7f51\u7edc\u722c\u866b\u5de5\u5177\u3002<\/p>\n<\/p>\n4.1 \u4f7f\u7528BeautifulSoup<\/h4>\n<\/p>\n
BeautifulSoup<\/code>\u662f\u4e00\u4e2a\u7b80\u5355\u6613\u7528\u7684HTML\u89e3\u6790\u5e93\uff0c\u9002\u5408\u5c0f\u578b\u722c\u866b\u4efb\u52a1\u3002<\/p>\n<\/p>\nimport requests<\/p>\nfrom bs4 import BeautifulSoup<\/p>\n
url = 'http:\/\/example.com'<\/p>\n
response = requests.get(url)<\/p>\n
soup = BeautifulSoup(response.content, 'html.parser')<\/p>\n
print(soup.title.text)<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528requests<\/code>\u5e93\u83b7\u53d6\u7f51\u9875\u5185\u5bb9\uff0c\u5e76\u7528BeautifulSoup<\/code>\u89e3\u6790HTML\u6587\u6863\u3002\u7136\u540e\uff0c\u6211\u4eec\u63d0\u53d6\u4e86\u7f51\u9875\u7684\u6807\u9898\u3002<\/p>\n<\/p>\n4.2 \u4f7f\u7528Scrapy<\/h4>\n<\/p>\n
Scrapy<\/code>\u662f\u4e00\u4e2a\u529f\u80fd\u5f3a\u5927\u7684\u722c\u866b\u6846\u67b6\uff0c\u9002\u5408\u5927\u578b\u722c\u866b\u9879\u76ee\u3002<\/p>\n<\/p>\n\u8981\u4f7f\u7528Scrapy<\/code>\uff0c\u9996\u5148\u9700\u8981\u5b89\u88c5\u5e76\u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u722c\u866b\u9879\u76ee\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u7b80\u5355\u7684\u4f8b\u5b50\uff1a<\/p>\n<\/p>\nscrapy startproject myproject<\/p>\ncd myproject<\/p>\n
scrapy genspider example example.com<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u7136\u540e\uff0c\u5728\u751f\u6210\u7684spider\u6587\u4ef6\u4e2d\u7f16\u5199\u722c\u866b\u4ee3\u7801\uff1a<\/p>\n<\/p>\n
import scrapy<\/p>\nclass ExampleSpider(scrapy.Spider):<\/p>\n
name = 'example'<\/p>\n
start_urls = ['http:\/\/example.com']<\/p>\n
def parse(self, response):<\/p>\n
title = response.css('title::text').get()<\/p>\n
yield {'title': title}<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u6211\u4eec\u521b\u5efa\u4e86\u4e00\u4e2a\u65b0\u7684Scrapy\u9879\u76ee\u548c\u722c\u866b\uff0c\u5e76\u5728\u722c\u866b\u4e2d\u5b9a\u4e49\u4e86\u6570\u636e\u63d0\u53d6\u903b\u8f91\u3002\u8fd0\u884c\u722c\u866b\u53ef\u4ee5\u63d0\u53d6\u7f51\u9875\u7684\u6807\u9898\u3002<\/p>\n<\/p>\n
\u603b\u7ed3<\/h3>\n<\/p>\n
\u7528Python\u8c03\u53d6\u6570\u636e\u7684\u65b9\u5f0f\u591a\u79cd\u591a\u6837\uff0c\u9009\u62e9\u5408\u9002\u7684\u65b9\u6cd5\u53d6\u51b3\u4e8e\u6570\u636e\u6765\u6e90\u548c\u9700\u6c42\u3002API\u63a5\u53e3\u9002\u5408\u5b9e\u65f6\u6570\u636e\u3001\u6587\u4ef6\u8bfb\u53d6\u9002\u5408\u672c\u5730\u6570\u636e\u3001\u6570\u636e\u5e93\u8fde\u63a5\u9002\u5408\u7ed3\u6784\u5316\u6570\u636e\u3001\u7f51\u7edc\u722c\u866b\u5219\u9002\u5408\u4ece\u7f51\u9875\u63d0\u53d6\u6570\u636e\u3002<\/strong>\u65e0\u8bba\u4f7f\u7528\u54ea\u79cd\u65b9\u6cd5\uff0c\u7406\u89e3\u6570\u636e\u683c\u5f0f\u548c\u7ed3\u6784\u3001\u4e86\u89e3\u6570\u636e\u6765\u6e90\u7684\u9650\u5236\u3001\u4ee5\u53ca\u9075\u5b88\u6570\u636e\u4f7f\u7528\u7684\u6cd5\u5f8b\u548c\u9053\u5fb7\u89c4\u8303\u90fd\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002\u901a\u8fc7\u5408\u7406\u4f7f\u7528\u8fd9\u4e9b\u6280\u672f\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u83b7\u53d6\u548c\u5206\u6790\u6570\u636e\uff0c\u4e3a\u51b3\u7b56\u63d0\u4f9b\u652f\u6301\u3002<\/p>\n<\/p>\n\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n \u5982\u4f55\u4f7f\u7528Python\u8fde\u63a5\u5230\u6570\u636e\u5e93\u4ee5\u8c03\u53d6\u6570\u636e\uff1f<\/strong>
\u8981\u8fde\u63a5\u5230\u6570\u636e\u5e93\u5e76\u8c03\u53d6\u6570\u636e\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528Python\u4e2d\u7684\u5e93\uff0c\u5982sqlite3<\/code>\u3001pymysql<\/code>\u6216psycopg2<\/code>\u7b49\uff0c\u5177\u4f53\u53d6\u51b3\u4e8e\u60a8\u4f7f\u7528\u7684\u6570\u636e\u5e93\u7c7b\u578b\u3002\u9996\u5148\uff0c\u5b89\u88c5\u6240\u9700\u7684\u5e93\uff0c\u7136\u540e\u4f7f\u7528\u76f8\u5e94\u7684\u8fde\u63a5\u5b57\u7b26\u4e32\u6765\u5efa\u7acb\u8fde\u63a5\u3002\u63a5\u4e0b\u6765\uff0c\u60a8\u53ef\u4ee5\u7f16\u5199SQL\u67e5\u8be2\u8bed\u53e5\uff0c\u901a\u8fc7\u6267\u884c\u8fd9\u4e9b\u8bed\u53e5\u6765\u83b7\u53d6\u6240\u9700\u7684\u6570\u636e\u3002\u83b7\u53d6\u7684\u6570\u636e\u53ef\u4ee5\u5b58\u50a8\u5728Pandas DataFrame\u4e2d\uff0c\u4ee5\u4fbf\u4e8e\u540e\u7eed\u7684\u6570\u636e\u5206\u6790\u548c\u5904\u7406\u3002<\/p>\n\u5728Python\u4e2d\u5982\u4f55\u5904\u7406API\u8bf7\u6c42\u4ee5\u83b7\u53d6\u6570\u636e\uff1f<\/strong>
\u4f7f\u7528Python\u4e2d\u7684requests<\/code>\u5e93\uff0c\u53ef\u4ee5\u8f7b\u677e\u5904\u7406API\u8bf7\u6c42\u3002\u60a8\u53ea\u9700\u5b89\u88c5\u8be5\u5e93\uff0c\u7136\u540e\u4f7f\u7528requests.get()<\/code>\u6216requests.post()<\/code>\u65b9\u6cd5\u53d1\u8d77\u8bf7\u6c42\u3002\u60a8\u53ef\u4ee5\u5728\u8bf7\u6c42\u4e2d\u5305\u542b\u5fc5\u8981\u7684\u53c2\u6570\u548c\u5934\u4fe1\u606f\u3002\u6210\u529f\u8bf7\u6c42\u540e\uff0cAPI\u901a\u5e38\u4f1a\u8fd4\u56deJSON\u683c\u5f0f\u7684\u6570\u636e\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528response.json()<\/code>\u65b9\u6cd5\u5c06\u5176\u8f6c\u6362\u4e3aPython\u5b57\u5178\uff0c\u4ee5\u4fbf\u4e8e\u540e\u7eed\u7684\u6570\u636e\u5904\u7406\u548c\u5206\u6790\u3002<\/p>\n\u6709\u4ec0\u4e48\u65b9\u6cd5\u53ef\u4ee5\u5728Python\u4e2d\u8bfb\u53d6CSV\u6587\u4ef6\u5e76\u63d0\u53d6\u6570\u636e\uff1f<\/strong>
\u53ef\u4ee5\u4f7f\u7528pandas<\/code>\u5e93\u6765\u8bfb\u53d6CSV\u6587\u4ef6\u5e76\u63d0\u53d6\u6570\u636e\u3002\u901a\u8fc7pandas.read_csv()<\/code>\u51fd\u6570\uff0c\u53ef\u4ee5\u8f7b\u677e\u52a0\u8f7dCSV\u6587\u4ef6\u4e3aDataFrame\u5bf9\u8c61\u3002\u8be5\u5bf9\u8c61\u5141\u8bb8\u60a8\u4f7f\u7528\u591a\u79cd\u65b9\u6cd5\u6765\u8fc7\u6ee4\u548c\u9009\u62e9\u7279\u5b9a\u7684\u6570\u636e\u884c\u6216\u5217\u3002\u901a\u8fc7\u5bf9DataFrame\u7684\u64cd\u4f5c\uff0c\u60a8\u53ef\u4ee5\u8fdb\u884c\u6570\u636e\u6e05\u6d17\u3001\u8f6c\u6362\u4ee5\u53ca\u5206\u6790\uff0c\u5341\u5206\u65b9\u4fbf\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"\u8981\u7528Python\u8c03\u53d6\u6570\u636e\uff0c\u53ef\u4ee5\u4f7f\u7528\u591a\u79cd\u65b9\u5f0f\u3002\u5e38\u89c1\u7684\u65b9\u6cd5\u5305\u62ec\u4f7f\u7528API\u63a5\u53e3\u3001\u76f4\u63a5\u8bfb\u53d6\u6587\u4ef6\u3001\u4f7f\u7528\u6570\u636e\u5e93\u8fde\u63a5\u3001\u4ee5\u53ca\u7f51 […]","protected":false},"author":3,"featured_media":1017268,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[37],"tags":[],"acf":[],"_links":{"self":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1017259"}],"collection":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/comments?post=1017259"}],"version-history":[{"count":"1","href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1017259\/revisions"}],"predecessor-version":[{"id":1017270,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1017259\/revisions\/1017270"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/1017268"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=1017259"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=1017259"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=1017259"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
![\"\u5982\u4f55\u7528python\u8c03\u53d6\u6570\u636e\"](\"https:\/\/cdn-kb.worktile.com\/kb\/wp-content\/uploads\/2024\/04\/25160201\/6c0633f6-dc69-430a-bb3b-f51150bf3b6c.webp\")
<\/p>\n