{"id":1059438,"date":"2024-12-31T15:25:11","date_gmt":"2024-12-31T07:25:11","guid":{"rendered":""},"modified":"2024-12-31T15:25:14","modified_gmt":"2024-12-31T07:25:14","slug":"%e5%a6%82%e4%bd%95%e7%94%a8python%e9%87%87%e9%9b%86%e6%95%b0%e6%8d%ae%e5%a4%84%e7%90%86","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/1059438.html","title":{"rendered":"\u5982\u4f55\u7528python\u91c7\u96c6\u6570\u636e\u5904\u7406"},"content":{"rendered":"<p style=\"text-align:center;\" ><img decoding=\"async\" src=\"https:\/\/cdn-docs.pingcode.com\/wp-content\/uploads\/2024\/12\/3797e400-77ab-4b88-a6b7-878a113fb76b.webp?x-oss-process=image\/auto-orient,1\/format,webp\" alt=\"\u5982\u4f55\u7528python\u91c7\u96c6\u6570\u636e\u5904\u7406\" \/><\/p>\n<p><p> <strong>\u4f7f\u7528Python\u8fdb\u884c\u6570\u636e\u91c7\u96c6\u4e0e\u5904\u7406<\/strong><\/p>\n<\/p>\n<p><p>\u4f7f\u7528Python\u8fdb\u884c\u6570\u636e\u91c7\u96c6\u4e0e\u5904\u7406\u7684\u6838\u5fc3\u5728\u4e8e<strong>\u6570\u636e\u6293\u53d6\u3001\u6570\u636e\u6e05\u6d17\u3001\u6570\u636e\u5206\u6790\u3001\u6570\u636e\u5b58\u50a8<\/strong>\u3002\u5728\u8fd9\u7bc7\u6587\u7ae0\u4e2d\uff0c\u6211\u4eec\u5c06\u8be6\u7ec6\u63a2\u8ba8\u5982\u4f55\u901a\u8fc7Python\u8fdb\u884c\u6570\u636e\u91c7\u96c6\u548c\u5904\u7406\u7684\u5404\u4e2a\u6b65\u9aa4\uff0c\u5e76\u63d0\u4f9b\u4e00\u4e9b\u6709\u7528\u7684\u4ee3\u7801\u793a\u4f8b\u548c\u5de5\u5177\u63a8\u8350\u3002\u6211\u4eec\u5c06\u91cd\u70b9\u4ecb\u7ecd\u5982\u4f55\u4f7f\u7528Python\u5e93\u8fdb\u884c\u7f51\u9875\u6570\u636e\u6293\u53d6\uff0c\u5e76\u5bf9\u6293\u53d6\u7684\u6570\u636e\u8fdb\u884c\u6e05\u6d17\u548c\u5904\u7406\u3002<\/p>\n<\/p>\n<p><h3>\u4e00\u3001\u6570\u636e\u6293\u53d6<\/h3>\n<\/p>\n<p><p>\u6570\u636e\u6293\u53d6\u662f\u6570\u636e\u91c7\u96c6\u7684\u7b2c\u4e00\u6b65\uff0c\u4e3b\u8981\u901a\u8fc7\u7f51\u9875\u722c\u866b\u6280\u672f\u5b9e\u73b0\u3002Python\u6709\u591a\u4e2a\u5f3a\u5927\u7684\u5e93\u53ef\u4ee5\u7528\u6765\u6293\u53d6\u7f51\u9875\u6570\u636e\uff0c\u4f8b\u5982\uff1a<strong>Requests\u3001BeautifulSoup\u3001Scrapy\u3001Selenium<\/strong>\u3002<\/p>\n<\/p>\n<p><h4>1. \u4f7f\u7528Requests\u5e93\u8fdb\u884c\u7b80\u5355\u6570\u636e\u6293\u53d6<\/h4>\n<\/p>\n<p><p>Requests\u5e93\u662f\u4e00\u4e2a\u7b80\u5355\u6613\u7528\u7684HTTP\u5e93\uff0c\u53ef\u4ee5\u5e2e\u52a9\u6211\u4eec\u53d1\u9001HTTP\u8bf7\u6c42\uff0c\u4ece\u7f51\u9875\u83b7\u53d6\u6570\u636e\u3002<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">import requests<\/p>\n<p>url = &#39;https:\/\/example.com&#39;<\/p>\n<p>response = requests.get(url)<\/p>\n<p>print(response.text)<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><h4>2. \u4f7f\u7528BeautifulSoup\u5e93\u89e3\u6790HTML\u5185\u5bb9<\/h4>\n<\/p>\n<p><p>BeautifulSoup\u662f\u4e00\u4e2a\u7528\u4e8e\u89e3\u6790HTML\u548cXML\u6587\u4ef6\u7684\u5e93\uff0c\u5b83\u53ef\u4ee5\u65b9\u4fbf\u5730\u4ece\u7f51\u9875\u4e2d\u63d0\u53d6\u6570\u636e\u3002<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">from bs4 import BeautifulSoup<\/p>\n<p>soup = BeautifulSoup(response.text, &#39;html.parser&#39;)<\/p>\n<p>title = soup.title.string<\/p>\n<p>print(title)<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><h4>3. \u4f7f\u7528Scrapy\u8fdb\u884c\u590d\u6742\u6570\u636e\u6293\u53d6<\/h4>\n<\/p>\n<p><p>Scrapy\u662f\u4e00\u4e2a\u529f\u80fd\u5f3a\u5927\u7684\u722c\u866b\u6846\u67b6\uff0c\u9002\u5408\u6293\u53d6\u5927\u91cf\u6570\u636e\u548c\u590d\u6742\u7f51\u7ad9\u3002<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">import scrapy<\/p>\n<p>class ExampleSpider(scrapy.Spider):<\/p>\n<p>    name = &#39;example&#39;<\/p>\n<p>    start_urls = [&#39;https:\/\/example.com&#39;]<\/p>\n<p>    def parse(self, response):<\/p>\n<p>        title = response.xpath(&#39;\/\/title\/text()&#39;).get()<\/p>\n<p>        yield {&#39;title&#39;: title}<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><h4>4. \u4f7f\u7528Selenium\u5904\u7406JavaScript\u52a8\u6001\u52a0\u8f7d\u5185\u5bb9<\/h4>\n<\/p>\n<p><p>Selenium\u662f\u4e00\u4e2a\u81ea\u52a8\u5316\u6d4b\u8bd5\u5de5\u5177\uff0c\u53ef\u4ee5\u6a21\u62df\u6d4f\u89c8\u5668\u64cd\u4f5c\uff0c\u9002\u5408\u6293\u53d6\u52a8\u6001\u52a0\u8f7d\u7684\u6570\u636e\u3002<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">from selenium import webdriver<\/p>\n<p>driver = webdriver.Chrome()<\/p>\n<p>driver.get(&#39;https:\/\/example.com&#39;)<\/p>\n<p>content = driver.page_source<\/p>\n<p>print(content)<\/p>\n<p>driver.quit()<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><h3>\u4e8c\u3001\u6570\u636e\u6e05\u6d17<\/h3>\n<\/p>\n<p><p>\u6570\u636e\u6293\u53d6\u5b8c\u6210\u540e\uff0c\u901a\u5e38\u9700\u8981\u5bf9\u6570\u636e\u8fdb\u884c\u6e05\u6d17\uff0c\u4ee5\u4fbf\u540e\u7eed\u7684\u5206\u6790\u548c\u5904\u7406\u3002\u6570\u636e\u6e05\u6d17\u7684\u4e3b\u8981\u6b65\u9aa4\u5305\u62ec\uff1a<strong>\u5904\u7406\u7f3a\u5931\u503c\u3001\u53bb\u9664\u91cd\u590d\u6570\u636e\u3001\u6570\u636e\u683c\u5f0f\u8f6c\u6362\u3001\u5904\u7406\u5f02\u5e38\u503c<\/strong>\u3002<\/p>\n<\/p>\n<p><h4>1. \u5904\u7406\u7f3a\u5931\u503c<\/h4>\n<\/p>\n<p><p>\u7f3a\u5931\u503c\u662f\u6307\u6570\u636e\u96c6\u4e2d\u5b58\u5728\u7a7a\u503c\u6216NaN\u503c\uff0c\u9700\u8981\u8fdb\u884c\u586b\u8865\u6216\u5220\u9664\u3002<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">import pandas as pd<\/p>\n<p>data = pd.read_csv(&#39;data.csv&#39;)<\/p>\n<p>data.fillna(method=&#39;ffill&#39;, inplace=True)  # \u524d\u5411\u586b\u5145<\/p>\n<p>data.dropna(inplace=True)  # \u5220\u9664\u542b\u7f3a\u5931\u503c\u7684\u884c<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><h4>2. \u53bb\u9664\u91cd\u590d\u6570\u636e<\/h4>\n<\/p>\n<p><p>\u91cd\u590d\u6570\u636e\u4f1a\u5f71\u54cd\u5206\u6790\u7ed3\u679c\uff0c\u9700\u8981\u8fdb\u884c\u53bb\u91cd\u5904\u7406\u3002<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">data.drop_duplicates(inplace=True)<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><h4>3. \u6570\u636e\u683c\u5f0f\u8f6c\u6362<\/h4>\n<\/p>\n<p><p>\u5c06\u6570\u636e\u8f6c\u6362\u4e3a\u4e00\u81f4\u7684\u683c\u5f0f\uff0c\u4ee5\u4fbf\u540e\u7eed\u5904\u7406\u3002<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">data[&#39;date&#39;] = pd.to_datetime(data[&#39;date&#39;])<\/p>\n<p>data[&#39;price&#39;] = data[&#39;price&#39;].astype(float)<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><h4>4. \u5904\u7406\u5f02\u5e38\u503c<\/h4>\n<\/p>\n<p><p>\u5f02\u5e38\u503c\u662f\u6307\u4e0e\u5176\u4ed6\u6570\u636e\u70b9\u660e\u663e\u4e0d\u540c\u7684\u6570\u636e\uff0c\u9700\u8981\u8fdb\u884c\u5904\u7406\u3002<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">import numpy as np<\/p>\n<p>data = data[(np.abs(data[&#39;price&#39;] - data[&#39;price&#39;].mean()) &lt;= (3 * data[&#39;price&#39;].std()))]<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><h3>\u4e09\u3001\u6570\u636e\u5206\u6790<\/h3>\n<\/p>\n<p><p>\u6570\u636e\u5206\u6790\u662f\u5bf9\u6e05\u6d17\u540e\u7684\u6570\u636e\u8fdb\u884c\u7edf\u8ba1\u548c\u5efa\u6a21\uff0c\u4ee5\u53d1\u73b0\u5176\u4e2d\u7684\u89c4\u5f8b\u548c\u8d8b\u52bf\u3002Python\u6709\u591a\u4e2a\u5f3a\u5927\u7684\u5e93\u53ef\u4ee5\u7528\u6765\u8fdb\u884c\u6570\u636e\u5206\u6790\uff0c\u4f8b\u5982\uff1a<strong>Pandas\u3001NumPy\u3001Matplotlib\u3001Seaborn\u3001Scikit-learn<\/strong>\u3002<\/p>\n<\/p>\n<p><h4>1. \u4f7f\u7528Pandas\u8fdb\u884c\u6570\u636e\u64cd\u4f5c<\/h4>\n<\/p>\n<p><p>Pandas\u662f\u4e00\u4e2a\u6570\u636e\u5206\u6790\u548c\u64cd\u4f5c\u5e93\uff0c\u53ef\u4ee5\u65b9\u4fbf\u5730\u5904\u7406\u6570\u636e\u8868\u3002<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">summary = data.describe()<\/p>\n<p>print(summary)<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><h4>2. \u4f7f\u7528NumPy\u8fdb\u884c\u6570\u503c\u8ba1\u7b97<\/h4>\n<\/p>\n<p><p>NumPy\u662f\u4e00\u4e2a\u6570\u503c\u8ba1\u7b97\u5e93\uff0c\u53ef\u4ee5\u8fdb\u884c\u9ad8\u6548\u7684\u6570\u7ec4\u64cd\u4f5c\u3002<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">import numpy as np<\/p>\n<p>mean_price = np.mean(data[&#39;price&#39;])<\/p>\n<p>print(mean_price)<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><h4>3. \u4f7f\u7528Matplotlib\u8fdb\u884c\u6570\u636e\u53ef\u89c6\u5316<\/h4>\n<\/p>\n<p><p>Matplotlib\u662f\u4e00\u4e2a\u7ed8\u56fe\u5e93\uff0c\u53ef\u4ee5\u521b\u5efa\u5404\u79cd\u56fe\u8868\u3002<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">import matplotlib.pyplot as plt<\/p>\n<p>data[&#39;price&#39;].hist(bins=50)<\/p>\n<p>plt.show()<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><h4>4. \u4f7f\u7528Seaborn\u8fdb\u884c\u9ad8\u7ea7\u6570\u636e\u53ef\u89c6\u5316<\/h4>\n<\/p>\n<p><p>Seaborn\u662f\u4e00\u4e2a\u57fa\u4e8eMatplotlib\u7684\u9ad8\u7ea7\u7ed8\u56fe\u5e93\uff0c\u53ef\u4ee5\u521b\u5efa\u7f8e\u89c2\u7684\u7edf\u8ba1\u56fe\u8868\u3002<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">import seaborn as sns<\/p>\n<p>sns.boxplot(x=&#39;category&#39;, y=&#39;price&#39;, data=data)<\/p>\n<p>plt.show()<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><h4>5. \u4f7f\u7528Scikit-learn\u8fdb\u884c<a href=\"https:\/\/docs.pingcode.com\/ask\/59192.html\" target=\"_blank\">\u673a\u5668\u5b66\u4e60<\/a><\/h4>\n<\/p>\n<p><p>Scikit-learn\u662f\u4e00\u4e2a\u673a\u5668\u5b66\u4e60\u5e93\uff0c\u53ef\u4ee5\u8fdb\u884c\u6570\u636e\u5efa\u6a21\u548c\u9884\u6d4b\u3002<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">from sklearn.linear_model import LinearRegression<\/p>\n<p>X = data[[&#39;feature1&#39;, &#39;feature2&#39;]]<\/p>\n<p>y = data[&#39;price&#39;]<\/p>\n<p>model = LinearRegression()<\/p>\n<p>model.fit(X, y)<\/p>\n<p>predictions = model.predict(X)<\/p>\n<p>print(predictions)<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><h3>\u56db\u3001\u6570\u636e\u5b58\u50a8<\/h3>\n<\/p>\n<p><p>\u6570\u636e\u5b58\u50a8\u662f\u5c06\u5904\u7406\u540e\u7684\u6570\u636e\u4fdd\u5b58\u5230\u6587\u4ef6\u6216\u6570\u636e\u5e93\u4e2d\uff0c\u4ee5\u4fbf\u540e\u7eed\u4f7f\u7528\u3002Python\u6709\u591a\u4e2a\u5e93\u53ef\u4ee5\u7528\u6765\u8fdb\u884c\u6570\u636e\u5b58\u50a8\uff0c\u4f8b\u5982\uff1a<strong>Pandas\u3001SQLAlchemy\u3001PyMongo<\/strong>\u3002<\/p>\n<\/p>\n<p><h4>1. \u4f7f\u7528Pandas\u4fdd\u5b58\u6570\u636e\u5230CSV\u6587\u4ef6<\/h4>\n<\/p>\n<p><pre><code class=\"language-python\">data.to_csv(&#39;cleaned_data.csv&#39;, index=False)<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><h4>2. \u4f7f\u7528SQLAlchemy\u4fdd\u5b58\u6570\u636e\u5230SQL\u6570\u636e\u5e93<\/h4>\n<\/p>\n<p><p>SQLAlchemy\u662f\u4e00\u4e2aSQL\u6570\u636e\u5e93\u5de5\u5177\uff0c\u53ef\u4ee5\u5c06\u6570\u636e\u4fdd\u5b58\u5230\u5173\u7cfb\u6570\u636e\u5e93\u4e2d\u3002<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">from sqlalchemy import create_engine<\/p>\n<p>engine = create_engine(&#39;sqlite:\/\/\/data.db&#39;)<\/p>\n<p>data.to_sql(&#39;table_name&#39;, engine, index=False)<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><h4>3. \u4f7f\u7528PyMongo\u4fdd\u5b58\u6570\u636e\u5230MongoDB\u6570\u636e\u5e93<\/h4>\n<\/p>\n<p><p>PyMongo\u662f\u4e00\u4e2aMongoDB\u6570\u636e\u5e93\u5de5\u5177\uff0c\u53ef\u4ee5\u5c06\u6570\u636e\u4fdd\u5b58\u5230NoSQL\u6570\u636e\u5e93\u4e2d\u3002<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">from pymongo import MongoClient<\/p>\n<p>client = MongoClient(&#39;localhost&#39;, 27017)<\/p>\n<p>db = client[&#39;database_name&#39;]<\/p>\n<p>collection = db[&#39;collection_name&#39;]<\/p>\n<p>collection.insert_many(data.to_dict(&#39;records&#39;))<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><h3>\u603b\u7ed3<\/h3>\n<\/p>\n<p><p>\u901a\u8fc7Python\u8fdb\u884c\u6570\u636e\u91c7\u96c6\u4e0e\u5904\u7406\uff0c\u53ef\u4ee5\u4f7f\u7528\u591a\u79cd\u5e93\u548c\u5de5\u5177\u6765\u5b8c\u6210\u6570\u636e\u6293\u53d6\u3001\u6570\u636e\u6e05\u6d17\u3001\u6570\u636e\u5206\u6790\u548c\u6570\u636e\u5b58\u50a8\u3002<strong>Requests\u3001BeautifulSoup\u3001Scrapy\u3001Selenium<\/strong>\u7b49\u5e93\u53ef\u4ee5\u5e2e\u52a9\u6211\u4eec\u9ad8\u6548\u5730\u6293\u53d6\u7f51\u9875\u6570\u636e\uff0c<strong>Pandas\u3001NumPy\u3001Matplotlib\u3001Seaborn\u3001Scikit-learn<\/strong>\u7b49\u5e93\u53ef\u4ee5\u5e2e\u52a9\u6211\u4eec\u5bf9\u6570\u636e\u8fdb\u884c\u6e05\u6d17\u3001\u5206\u6790\u548c\u5efa\u6a21\uff0c<strong>SQLAlchemy\u3001PyMongo<\/strong>\u7b49\u5e93\u53ef\u4ee5\u5e2e\u52a9\u6211\u4eec\u5c06\u5904\u7406\u540e\u7684\u6570\u636e\u4fdd\u5b58\u5230\u6570\u636e\u5e93\u4e2d\u3002\u901a\u8fc7\u7cfb\u7edf\u5730\u5b66\u4e60\u548c\u5e94\u7528\u8fd9\u4e9b\u5de5\u5177\uff0c\u6211\u4eec\u53ef\u4ee5\u9ad8\u6548\u5730\u8fdb\u884c\u6570\u636e\u91c7\u96c6\u548c\u5904\u7406\uff0c\u5e76\u4ece\u4e2d\u53d1\u73b0\u6709\u4ef7\u503c\u7684\u4fe1\u606f\u3002<\/p>\n<\/p>\n<p><p>\u5e0c\u671b\u672c\u6587\u5bf9\u4f60\u5728\u4f7f\u7528Python\u8fdb\u884c\u6570\u636e\u91c7\u96c6\u548c\u5904\u7406\u65b9\u9762\u6709\u6240\u5e2e\u52a9\u3002\u5982\u679c\u4f60\u6709\u4efb\u4f55\u95ee\u9898\u6216\u5efa\u8bae\uff0c\u6b22\u8fce\u5728\u8bc4\u8bba\u533a\u7559\u8a00\u3002<\/p>\n<\/p>\n<h2><strong>\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n<p> 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\/>\u5728\u6570\u636e\u5904\u7406\u65b9\u9762\uff0cPython\u63d0\u4f9b\u4e86\u591a\u79cd\u6280\u672f\u548c\u65b9\u6cd5\u3002\u6570\u636e\u6e05\u6d17\u662f\u4e00\u4e2a\u91cd\u8981\u73af\u8282\uff0c\u901a\u5e38\u4f7f\u7528Pandas\u5e93\u6765\u5904\u7406\u7f3a\u5931\u503c\u3001\u91cd\u590d\u6570\u636e\u548c\u683c\u5f0f\u4e0d\u4e00\u81f4\u7684\u95ee\u9898\u3002\u6b64\u5916\uff0c\u6570\u636e\u8f6c\u6362\u548c\u5f52\u4e00\u5316\u4e5f\u662f\u5e38\u89c1\u64cd\u4f5c\uff0c\u5229\u7528NumPy\u5e93\u53ef\u4ee5\u8fdb\u884c\u9ad8\u6548\u7684\u6570\u503c\u8ba1\u7b97\u3002\u53ef\u89c6\u5316\u65b9\u9762\uff0cMatplotlib\u548cSeaborn\u5e93\u5219\u80fd\u591f\u5e2e\u52a9\u7528\u6237\u76f4\u89c2\u5c55\u793a\u6570\u636e\u5206\u6790\u7ed3\u679c\u3002<\/p>\n<p><strong>\u5728\u6570\u636e\u91c7\u96c6\u8fc7\u7a0b\u4e2d\uff0c\u5982\u4f55\u5904\u7406\u53cd\u722c\u866b\u63aa\u65bd\uff1f<\/strong><br 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