{"id":1045207,"date":"2024-12-31T13:21:07","date_gmt":"2024-12-31T05:21:07","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/1045207.html"},"modified":"2024-12-31T13:21:13","modified_gmt":"2024-12-31T05:21:13","slug":"%e5%a6%82%e4%bd%95%e7%94%a8python%e5%81%9a%e5%85%a8%e7%bd%91%e6%90%9c%e7%b4%a2%e5%99%a8","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/1045207.html","title":{"rendered":"\u5982\u4f55\u7528python\u505a\u5168\u7f51\u641c\u7d22\u5668"},"content":{"rendered":"<p style=\"text-align:center;\" ><img decoding=\"async\" src=\"https:\/\/cdn-docs.pingcode.com\/wp-content\/uploads\/2024\/12\/01fc6ea0-1aa3-4b9b-88dc-0845f0b0be76.webp?x-oss-process=image\/auto-orient,1\/format,webp\" alt=\"\u5982\u4f55\u7528python\u505a\u5168\u7f51\u641c\u7d22\u5668\" \/><\/p>\n<p><p> \u7528Python\u5236\u4f5c\u5168\u7f51\u641c\u7d22\u5668\u6d89\u53ca\u591a\u4e2a\u6b65\u9aa4\u548c\u6280\u672f\uff0c\u5305\u62ec\u4f46\u4e0d\u9650\u4e8e\uff1a\u7f51\u9875\u6293\u53d6\u3001\u6570\u636e\u5904\u7406\u3001\u6570\u636e\u5e93\u7ba1\u7406\u548c\u7528\u6237\u754c\u9762\u8bbe\u8ba1\u3002<strong>\u5176\u4e2d\u7684\u5173\u952e\u6b65\u9aa4\u5305\u62ec\uff1a\u9009\u62e9\u5408\u9002\u7684\u7f51\u9875\u6293\u53d6\u5e93\u3001\u5904\u7406\u548c\u5b58\u50a8\u6570\u636e\u3001\u5b9e\u73b0\u641c\u7d22\u7b97\u6cd5\u3001\u8bbe\u8ba1\u7528\u6237\u754c\u9762<\/strong>\u3002\u5176\u4e2d\uff0c\u9009\u62e9\u5408\u9002\u7684\u7f51\u9875\u6293\u53d6\u5e93\u5c24\u4e3a\u91cd\u8981\uff0c\u56e0\u4e3a\u8fd9\u662f\u6574\u4e2a\u641c\u7d22\u5668\u7684\u57fa\u7840\u3002<\/p>\n<\/p>\n<p><p>\u4f7f\u7528Python\u521b\u5efa\u5168\u7f51\u641c\u7d22\u5668\u9700\u8981\u591a\u65b9\u9762\u7684\u77e5\u8bc6\u548c\u6280\u80fd\u3002\u9996\u5148\uff0c\u9009\u62e9\u5408\u9002\u7684\u7f51\u9875\u6293\u53d6\u5e93\uff0c\u6bd4\u5982BeautifulSoup\u548cScrapy\u3002BeautifulSoup\u9002\u5408\u5c0f\u89c4\u6a21\u7684\u6570\u636e\u6293\u53d6\uff0c\u6613\u4e8e\u4e0a\u624b\u548c\u4f7f\u7528\uff1bScrapy\u5219\u9002\u5408\u5927\u89c4\u6a21\u3001\u590d\u6742\u7684\u7f51\u9875\u6293\u53d6\u4efb\u52a1\uff0c\u5177\u6709\u9ad8\u6548\u3001\u53ef\u6269\u5c55\u7684\u7279\u70b9\u3002\u5bf9\u4e8e\u5927\u591a\u6570\u521d\u5b66\u8005\u6765\u8bf4\uff0cBeautifulSoup\u662f\u4e00\u4e2a\u5f88\u597d\u7684\u8d77\u70b9\uff0c\u56e0\u4e3a\u5b83\u7684\u5b66\u4e60\u66f2\u7ebf\u8f83\u4f4e\uff0c\u800c\u4e14\u53ef\u4ee5\u6ee1\u8db3\u57fa\u672c\u7684\u7f51\u9875\u6293\u53d6\u9700\u6c42\u3002<\/p>\n<\/p>\n<p><h3>\u4e00\u3001\u9009\u62e9\u5408\u9002\u7684\u7f51\u9875\u6293\u53d6\u5e93<\/h3>\n<\/p>\n<p><h4>1\u3001BeautifulSoup<\/h4>\n<\/p>\n<p><p>BeautifulSoup\u662f\u4e00\u4e2a\u7528\u4e8e\u89e3\u6790HTML\u548cXML\u6587\u6863\u7684\u5e93\uff0c\u53ef\u4ee5\u8f7b\u677e\u5730\u4ece\u7f51\u9875\u4e2d\u63d0\u53d6\u6570\u636e\u3002\u4ee5\u4e0b\u662fBeautifulSoup\u7684\u57fa\u672c\u4f7f\u7528\u65b9\u6cd5\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">from bs4 import BeautifulSoup<\/p>\n<p>import requests<\/p>\n<p>url = &#39;http:\/\/example.com&#39;<\/p>\n<p>response = requests.get(url)<\/p>\n<p>soup = BeautifulSoup(response.text, &#39;html.parser&#39;)<\/p>\n<h2><strong>\u627e\u5230\u6240\u6709\u7684\u94fe\u63a5<\/strong><\/h2>\n<p>for link in soup.find_all(&#39;a&#39;):<\/p>\n<p>    print(link.get(&#39;href&#39;))<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>BeautifulSoup\u7b80\u5355\u6613\u7528\uff0c\u975e\u5e38\u9002\u5408\u65b0\u624b\u548c\u5c0f\u89c4\u6a21\u7684\u6570\u636e\u6293\u53d6\u4efb\u52a1\u3002<\/p>\n<\/p>\n<p><h4>2\u3001Scrapy<\/h4>\n<\/p>\n<p><p>Scrapy\u662f\u4e00\u4e2a\u529f\u80fd\u5f3a\u5927\u7684\u7f51\u9875\u6293\u53d6\u6846\u67b6\uff0c\u9002\u5408\u5927\u89c4\u6a21\u548c\u590d\u6742\u7684\u6293\u53d6\u4efb\u52a1\u3002\u4ee5\u4e0b\u662fScrapy\u7684\u57fa\u672c\u4f7f\u7528\u65b9\u6cd5\uff1a<\/p>\n<\/p>\n<p><p>\u9996\u5148\uff0c\u5b89\u88c5Scrapy\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-bash\">pip install scrapy<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u7136\u540e\uff0c\u521b\u5efa\u4e00\u4e2a\u65b0\u7684Scrapy\u9879\u76ee\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-bash\">scrapy startproject myproject<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u63a5\u4e0b\u6765\uff0c\u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u722c\u866b\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-bash\">cd myproject<\/p>\n<p>scrapy genspider myspider example.com<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u7f16\u8f91\u751f\u6210\u7684\u722c\u866b\u6587\u4ef6<code>myspider.py<\/code>\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">import scrapy<\/p>\n<p>class MySpider(scrapy.Spider):<\/p>\n<p>    name = &#39;myspider&#39;<\/p>\n<p>    start_urls = [&#39;http:\/\/example.com&#39;]<\/p>\n<p>    def parse(self, response):<\/p>\n<p>        for link in response.css(&#39;a::attr(href)&#39;).getall():<\/p>\n<p>            yield {&#39;link&#39;: link}<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u6700\u540e\uff0c\u8fd0\u884c\u722c\u866b\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-bash\">scrapy crawl myspider<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>Scrapy\u5177\u6709\u9ad8\u5ea6\u7684\u53ef\u6269\u5c55\u6027\u548c\u7075\u6d3b\u6027\uff0c\u9002\u5408\u9700\u8981\u9ad8\u6548\u7387\u548c\u590d\u6742\u6293\u53d6\u4efb\u52a1\u7684\u7528\u6237\u3002<\/p>\n<\/p>\n<p><h3>\u4e8c\u3001\u6570\u636e\u5904\u7406\u4e0e\u5b58\u50a8<\/h3>\n<\/p>\n<p><h4>1\u3001\u6570\u636e\u6e05\u6d17\u4e0e\u9884\u5904\u7406<\/h4>\n<\/p>\n<p><p>\u5728\u6293\u53d6\u5230\u7f51\u9875\u6570\u636e\u540e\uff0c\u9700\u8981\u5bf9\u6570\u636e\u8fdb\u884c\u6e05\u6d17\u548c\u9884\u5904\u7406\u3002\u6570\u636e\u6e05\u6d17\u5305\u62ec\u53bb\u9664\u65e0\u7528\u4fe1\u606f\u3001\u5904\u7406\u7f3a\u5931\u503c\u548c\u6807\u51c6\u5316\u6570\u636e\u683c\u5f0f\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u7b80\u5355\u7684\u6570\u636e\u6e05\u6d17\u793a\u4f8b\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">import pandas as pd<\/p>\n<h2><strong>\u5047\u8bbe\u6293\u53d6\u7684\u6570\u636e\u5b58\u50a8\u5728\u4e00\u4e2aDataFrame\u4e2d<\/strong><\/h2>\n<p>data = pd.DataFrame({&#39;link&#39;: [&#39;http:\/\/example.com&#39;, &#39;http:\/\/example2.com&#39;, None]})<\/p>\n<h2><strong>\u53bb\u9664\u7f3a\u5931\u503c<\/strong><\/h2>\n<p>data = data.dropna()<\/p>\n<h2><strong>\u53bb\u9664\u91cd\u590d\u503c<\/strong><\/h2>\n<p>data = data.drop_duplicates()<\/p>\n<h2><strong>\u6e05\u6d17\u94fe\u63a5<\/strong><\/h2>\n<p>data[&#39;link&#39;] = data[&#39;link&#39;].str.strip()<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><h4>2\u3001\u6570\u636e\u5e93\u7ba1\u7406<\/h4>\n<\/p>\n<p><p>\u4e3a\u4e86\u9ad8\u6548\u5730\u5b58\u50a8\u548c\u67e5\u8be2\u5927\u91cf\u7684\u6570\u636e\uff0c\u5efa\u8bae\u4f7f\u7528\u6570\u636e\u5e93\u3002\u5e38\u7528\u7684\u6570\u636e\u5e93\u5305\u62ecSQLite\u3001MySQL\u548cMongoDB\u3002\u4ee5\u4e0b\u662f\u4f7f\u7528SQLite\u5b58\u50a8\u6570\u636e\u7684\u793a\u4f8b\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">import sqlite3<\/p>\n<h2><strong>\u521b\u5efa\u6570\u636e\u5e93\u8fde\u63a5<\/strong><\/h2>\n<p>conn = sqlite3.connect(&#39;search_engine.db&#39;)<\/p>\n<p>c = conn.cursor()<\/p>\n<h2><strong>\u521b\u5efa\u8868\u683c<\/strong><\/h2>\n<p>c.execute(&#39;&#39;&#39;CREATE TABLE IF NOT EXISTS links<\/p>\n<p>             (id INTEGER PRIMARY KEY AUTOINCREMENT, url TEXT)&#39;&#39;&#39;)<\/p>\n<h2><strong>\u63d2\u5165\u6570\u636e<\/strong><\/h2>\n<p>for link in data[&#39;link&#39;]:<\/p>\n<p>    c.execute(&#39;INSERT INTO links (url) VALUES (?)&#39;, (link,))<\/p>\n<h2><strong>\u63d0\u4ea4\u4e8b\u52a1<\/strong><\/h2>\n<p>conn.commit()<\/p>\n<h2><strong>\u5173\u95ed\u8fde\u63a5<\/strong><\/h2>\n<p>conn.close()<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><h3>\u4e09\u3001\u5b9e\u73b0\u641c\u7d22\u7b97\u6cd5<\/h3>\n<\/p>\n<p><h4>1\u3001\u57fa\u672c\u641c\u7d22\u7b97\u6cd5<\/h4>\n<\/p>\n<p><p>\u57fa\u672c\u7684\u641c\u7d22\u7b97\u6cd5\u53ef\u4ee5\u901a\u8fc7\u7b80\u5355\u7684\u5173\u952e\u8bcd\u5339\u914d\u6765\u5b9e\u73b0\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u7b80\u5355\u7684\u793a\u4f8b\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">def search(keyword, data):<\/p>\n<p>    return data[data[&#39;link&#39;].str.cont<a href=\"https:\/\/docs.pingcode.com\/blog\/59162.html\" target=\"_blank\">AI<\/a>ns(keyword, case=False)]<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><h4>2\u3001\u6539\u8fdb\u7684\u641c\u7d22\u7b97\u6cd5<\/h4>\n<\/p>\n<p><p>\u4e3a\u4e86\u63d0\u9ad8\u641c\u7d22\u7ed3\u679c\u7684\u51c6\u786e\u6027\u548c\u76f8\u5173\u6027\uff0c\u53ef\u4ee5\u91c7\u7528\u66f4\u590d\u6742\u7684\u641c\u7d22\u7b97\u6cd5\uff0c\u5982TF-IDF\uff08Term Frequency-Inverse Document Frequency\uff09\u548cBM25\u3002\u4ee5\u4e0b\u662f\u4f7f\u7528TF-IDF\u7684\u793a\u4f8b\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">from sklearn.feature_extraction.text import TfidfVectorizer<\/p>\n<h2><strong>\u5047\u8bbe\u6293\u53d6\u7684\u6570\u636e\u5b58\u50a8\u5728\u4e00\u4e2aDataFrame\u4e2d<\/strong><\/h2>\n<p>data = pd.DataFrame({&#39;link&#39;: [&#39;http:\/\/example.com&#39;, &#39;http:\/\/example2.com&#39;]})<\/p>\n<h2><strong>\u8ba1\u7b97TF-IDF<\/strong><\/h2>\n<p>vectorizer = TfidfVectorizer()<\/p>\n<p>tfidf_matrix = vectorizer.fit_transform(data[&#39;link&#39;])<\/p>\n<h2><strong>\u67e5\u8be2<\/strong><\/h2>\n<p>query = &#39;example&#39;<\/p>\n<p>query_vec = vectorizer.transform([query])<\/p>\n<h2><strong>\u8ba1\u7b97\u76f8\u4f3c\u5ea6<\/strong><\/h2>\n<p>from sklearn.metrics.pairwise import cosine_similarity<\/p>\n<p>similarity = cosine_similarity(query_vec, tfidf_matrix)<\/p>\n<h2><strong>\u83b7\u53d6\u6700\u76f8\u4f3c\u7684\u94fe\u63a5<\/strong><\/h2>\n<p>most_similar = similarity.argsort()[0][-1]<\/p>\n<p>print(data[&#39;link&#39;].iloc[most_similar])<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><h3>\u56db\u3001\u8bbe\u8ba1\u7528\u6237\u754c\u9762<\/h3>\n<\/p>\n<p><h4>1\u3001\u547d\u4ee4\u884c\u754c\u9762<\/h4>\n<\/p>\n<p><p>\u6700\u7b80\u5355\u7684\u7528\u6237\u754c\u9762\u662f\u547d\u4ee4\u884c\u754c\u9762\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u7b80\u5355\u7684\u793a\u4f8b\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">def main():<\/p>\n<p>    keyword = input(&#39;Enter a keyword: &#39;)<\/p>\n<p>    results = search(keyword, data)<\/p>\n<p>    for result in results[&#39;link&#39;]:<\/p>\n<p>        print(result)<\/p>\n<p>if __name__ == &#39;__main__&#39;:<\/p>\n<p>    main()<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><h4>2\u3001\u56fe\u5f62\u7528\u6237\u754c\u9762<\/h4>\n<\/p>\n<p><p>\u4e3a\u4e86\u63d0\u4f9b\u66f4\u53cb\u597d\u7684\u7528\u6237\u4f53\u9a8c\uff0c\u53ef\u4ee5\u4f7f\u7528\u56fe\u5f62\u7528\u6237\u754c\u9762\uff08GUI\uff09\u3002\u5e38\u7528\u7684GUI\u5e93\u5305\u62ecTkinter\u548cPyQt\u3002\u4ee5\u4e0b\u662f\u4f7f\u7528Tkinter\u521b\u5efa\u7b80\u5355GUI\u7684\u793a\u4f8b\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">import tkinter as tk<\/p>\n<p>from tkinter import simpledialog<\/p>\n<p>def search_and_display(keyword, data):<\/p>\n<p>    results = search(keyword, data)<\/p>\n<p>    for result in results[&#39;link&#39;]:<\/p>\n<p>        listbox.insert(tk.END, result)<\/p>\n<p>def on_search():<\/p>\n<p>    keyword = simpledialog.askstring(&quot;Input&quot;, &quot;Enter a keyword:&quot;)<\/p>\n<p>    if keyword:<\/p>\n<p>        search_and_display(keyword, data)<\/p>\n<p>root = tk.Tk()<\/p>\n<p>root.title(&quot;Search Engine&quot;)<\/p>\n<p>listbox = tk.Listbox(root)<\/p>\n<p>listbox.pack(fill=tk.BOTH, expand=True)<\/p>\n<p>search_button = tk.Button(root, text=&quot;Search&quot;, command=on_search)<\/p>\n<p>search_button.pack()<\/p>\n<p>root.mainloop()<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><h3>\u603b\u7ed3<\/h3>\n<\/p>\n<p><p>\u521b\u5efa\u4e00\u4e2a\u5168\u7f51\u641c\u7d22\u5668\u9700\u8981\u5168\u9762\u638c\u63e1\u7f51\u9875\u6293\u53d6\u3001\u6570\u636e\u5904\u7406\u4e0e\u5b58\u50a8\u3001\u641c\u7d22\u7b97\u6cd5\u548c\u7528\u6237\u754c\u9762\u8bbe\u8ba1\u7b49\u591a\u4e2a\u65b9\u9762\u7684\u77e5\u8bc6\u3002\u901a\u8fc7\u9009\u62e9\u5408\u9002\u7684\u7f51\u9875\u6293\u53d6\u5e93\uff0c\u6bd4\u5982BeautifulSoup\u548cScrapy\uff0c\u53ef\u4ee5\u9ad8\u6548\u5730\u6293\u53d6\u7f51\u9875\u6570\u636e\u3002\u6570\u636e\u5904\u7406\u548c\u5b58\u50a8\u662f\u786e\u4fdd\u6570\u636e\u8d28\u91cf\u548c\u67e5\u8be2\u6548\u7387\u7684\u5173\u952e\u3002\u5b9e\u73b0\u641c\u7d22\u7b97\u6cd5\u53ef\u4ee5\u901a\u8fc7\u7b80\u5355\u7684\u5173\u952e\u8bcd\u5339\u914d\u5f00\u59cb\uff0c\u7136\u540e\u9010\u6b65\u5f15\u5165\u66f4\u590d\u6742\u7684\u7b97\u6cd5\u5982TF-IDF\u3002\u6700\u540e\uff0c\u8bbe\u8ba1\u7528\u6237\u754c\u9762\u80fd\u591f\u63d0\u4f9b\u53cb\u597d\u7684\u7528\u6237\u4f53\u9a8c\u3002\u901a\u8fc7\u7cfb\u7edf\u5730\u5b66\u4e60\u548c\u5e94\u7528\u8fd9\u4e9b\u77e5\u8bc6\u548c\u6280\u80fd\uff0c\u4f60\u5c06\u80fd\u591f\u6210\u529f\u5730\u521b\u5efa\u4e00\u4e2a\u529f\u80fd\u5f3a\u5927\u7684\u5168\u7f51\u641c\u7d22\u5668\u3002<\/p>\n<\/p>\n<h2><strong>\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n<p> 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