{"id":1080502,"date":"2025-01-08T12:30:41","date_gmt":"2025-01-08T04:30:41","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/1080502.html"},"modified":"2025-01-08T12:30:45","modified_gmt":"2025-01-08T04:30:45","slug":"python%e5%a6%82%e4%bd%95%e6%90%9c%e7%b4%a2%e7%bd%91%e7%ab%99%e5%85%b3%e9%94%ae%e8%af%8d-2","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/1080502.html","title":{"rendered":"python\u5982\u4f55\u641c\u7d22\u7f51\u7ad9\u5173\u952e\u8bcd"},"content":{"rendered":"

\"python\u5982\u4f55\u641c\u7d22\u7f51\u7ad9\u5173\u952e\u8bcd\"<\/p>\n

Python\u53ef\u4ee5\u901a\u8fc7\u591a\u79cd\u65b9\u5f0f\u641c\u7d22\u7f51\u7ad9\u5173\u952e\u8bcd\uff1a\u4f7f\u7528BeautifulSoup\u8fdb\u884c\u7f51\u9875\u89e3\u6790\u3001\u4f7f\u7528Selenium\u6a21\u62df\u6d4f\u89c8\u5668\u64cd\u4f5c\u3001\u4f7f\u7528Scrapy\u8fdb\u884c\u722c\u866b\u64cd\u4f5c<\/strong>\u3002\u5176\u4e2d\uff0c\u4f7f\u7528BeautifulSoup\u8fdb\u884c\u7f51\u9875\u89e3\u6790\u662f\u4e00\u79cd\u5e38\u89c1\u4e14\u9ad8\u6548\u7684\u65b9\u6cd5\u3002\u4e0b\u9762\u5c06\u8be6\u7ec6\u4ecb\u7ecd\u5982\u4f55\u4f7f\u7528BeautifulSoup\u6765\u641c\u7d22\u7f51\u7ad9\u5173\u952e\u8bcd\u3002<\/p>\n<\/p>\n

\u4e00\u3001\u51c6\u5907\u5de5\u4f5c<\/h3>\n<\/p>\n

\u5728\u5f00\u59cb\u4f7f\u7528Python\u641c\u7d22\u7f51\u7ad9\u5173\u952e\u8bcd\u4e4b\u524d\uff0c\u9700\u8981\u786e\u4fdd\u5df2\u7ecf\u5b89\u88c5\u4e86\u76f8\u5173\u7684\u5e93\u3002\u5e38\u7528\u7684\u5e93\u5305\u62ecrequests<\/code>\u3001BeautifulSoup<\/code>\u548clxml<\/code>\u3002\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\u6765\u5b89\u88c5\u8fd9\u4e9b\u5e93\uff1a<\/p>\n<\/p>\n

pip install requests<\/p>\n
pip install beautifulsoup4<\/p>\n
pip install lxml<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u4e8c\u3001\u4f7f\u7528Requests\u83b7\u53d6\u7f51\u9875\u5185\u5bb9<\/h3>\n<\/p>\n
\u9996\u5148\uff0c\u9700\u8981\u4f7f\u7528requests<\/code>\u5e93\u6765\u83b7\u53d6\u7f51\u9875\u7684HTML\u5185\u5bb9\u3002requests<\/code>\u662f\u4e00\u4e2a\u7b80\u5355\u6613\u7528\u7684HTTP\u8bf7\u6c42\u5e93\uff0c\u53ef\u4ee5\u8f7b\u677e\u5730\u5411\u76ee\u6807\u7f51\u7ad9\u53d1\u9001\u8bf7\u6c42\u5e76\u83b7\u53d6\u54cd\u5e94\u3002<\/p>\n<\/p>\n
import requests<\/p>\n
url = 'https:\/\/example.com'<\/p>\n
response = requests.get(url)<\/p>\n
html_content = response.text<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u4e0a\u9762\u7684\u4ee3\u7801\u4e2d\uff0c\u6211\u4eec\u5411\u76ee\u6807\u7f51\u7ad9\u53d1\u9001\u4e86\u4e00\u4e2aGET\u8bf7\u6c42\uff0c\u5e76\u5c06\u8fd4\u56de\u7684HTML\u5185\u5bb9\u5b58\u50a8\u5728html_content<\/code>\u53d8\u91cf\u4e2d\u3002<\/p>\n<\/p>\n
\u4e09\u3001\u4f7f\u7528BeautifulSoup\u89e3\u6790HTML\u5185\u5bb9<\/h3>\n<\/p>\n
\u83b7\u53d6\u5230\u7f51\u9875\u7684HTML\u5185\u5bb9\u540e\uff0c\u53ef\u4ee5\u4f7f\u7528BeautifulSoup<\/code>\u6765\u89e3\u6790\u8fd9\u4e9b\u5185\u5bb9\u3002BeautifulSoup<\/code>\u662f\u4e00\u4e2a\u7528\u4e8e\u89e3\u6790HTML\u548cXML\u6587\u6863\u7684\u5e93\uff0c\u80fd\u591f\u8f7b\u677e\u5730\u4ece\u7f51\u9875\u4e2d\u63d0\u53d6\u6570\u636e\u3002<\/p>\n<\/p>\n
from bs4 import BeautifulSoup<\/p>\n
soup = BeautifulSoup(html_content, 'lxml')<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u4e0a\u9762\u7684\u4ee3\u7801\u4e2d\uff0c\u6211\u4eec\u5c06HTML\u5185\u5bb9\u4f20\u9012\u7ed9BeautifulSoup<\/code>\u5bf9\u8c61\uff0c\u5e76\u6307\u5b9a\u4f7f\u7528lxml<\/code>\u89e3\u6790\u5668\u8fdb\u884c\u89e3\u6790\u3002<\/p>\n<\/p>\n
\u56db\u3001\u641c\u7d22\u5173\u952e\u8bcd<\/h3>\n<\/p>\n
\u4e00\u65e6\u89e3\u6790\u4e86HTML\u5185\u5bb9\uff0c\u5c31\u53ef\u4ee5\u4f7f\u7528BeautifulSoup<\/code>\u63d0\u4f9b\u7684\u65b9\u6cd5\u6765\u641c\u7d22\u5173\u952e\u8bcd\u3002\u4f8b\u5982\uff0c\u53ef\u4ee5\u641c\u7d22\u7279\u5b9a\u7684\u6807\u7b7e\u3001\u5c5e\u6027\u6216\u6587\u672c\u5185\u5bb9\u3002\u4e0b\u9762\u662f\u4e00\u4e9b\u5e38\u89c1\u7684\u64cd\u4f5c\uff1a<\/p>\n<\/p>\n
1\u3001\u641c\u7d22\u7279\u5b9a\u6807\u7b7e<\/h4>\n<\/p>\n
\u53ef\u4ee5\u4f7f\u7528find_all<\/code>\u65b9\u6cd5\u6765\u641c\u7d22\u7279\u5b9a\u7684\u6807\u7b7e\uff0c\u4f8b\u5982\u641c\u7d22\u6240\u6709\u7684<p><\/code>\u6807\u7b7e\uff1a<\/p>\n<\/p>\n
paragraphs = soup.find_all('p')<\/p>\n
for p in paragraphs:<\/p>\n
    print(p.get_text())<\/p>\n
<\/code><\/pre>\n<\/p>\n
2\u3001\u641c\u7d22\u5305\u542b\u7279\u5b9a\u5c5e\u6027\u7684\u6807\u7b7e<\/h4>\n<\/p>\n
\u53ef\u4ee5\u901a\u8fc7attrs<\/code>\u53c2\u6570\u6765\u641c\u7d22\u5305\u542b\u7279\u5b9a\u5c5e\u6027\u7684\u6807\u7b7e\uff0c\u4f8b\u5982\u641c\u7d22\u6240\u6709\u5305\u542bclass="example"<\/code>\u7684<div><\/code>\u6807\u7b7e\uff1a<\/p>\n<\/p>\n
divs = soup.find_all('div', attrs={'class': 'example'})<\/p>\n
for div in divs:<\/p>\n
    print(div.get_text())<\/p>\n
<\/code><\/pre>\n<\/p>\n
3\u3001\u641c\u7d22\u5305\u542b\u7279\u5b9a\u6587\u672c\u7684\u6807\u7b7e<\/h4>\n<\/p>\n
\u53ef\u4ee5\u4f7f\u7528string<\/code>\u53c2\u6570\u6765\u641c\u7d22\u5305\u542b\u7279\u5b9a\u6587\u672c\u7684\u6807\u7b7e\uff0c\u4f8b\u5982\u641c\u7d22\u6240\u6709\u5305\u542b\u6587\u672c"keyword"<\/code>\u7684\u6807\u7b7e\uff1a<\/p>\n<\/p>\n
tags = soup.find_all(string='keyword')<\/p>\n
for tag in tags:<\/p>\n
    print(tag)<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u4e94\u3001\u7ed3\u5408\u6b63\u5219\u8868\u8fbe\u5f0f\u8fdb\u884c\u9ad8\u7ea7\u641c\u7d22<\/h3>\n<\/p>\n
\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c\u53ef\u80fd\u9700\u8981\u4f7f\u7528\u6b63\u5219\u8868\u8fbe\u5f0f\u6765\u8fdb\u884c\u66f4\u590d\u6742\u7684\u641c\u7d22\u3002\u53ef\u4ee5\u4f7f\u7528re<\/code>\u5e93\u6765\u5b9e\u73b0\u8fd9\u4e00\u70b9\u3002\u4f8b\u5982\uff0c\u641c\u7d22\u5305\u542b\u7279\u5b9a\u6a21\u5f0f\u7684\u6587\u672c\uff1a<\/p>\n<\/p>\n
import re<\/p>\n
pattern = re.compile(r'keyword')<\/p>\n
tags = soup.find_all(string=pattern)<\/p>\n
for tag in tags:<\/p>\n
    print(tag)<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u516d\u3001\u5904\u7406\u52a8\u6001\u7f51\u9875<\/h3>\n<\/p>\n
\u5bf9\u4e8e\u4e00\u4e9b\u52a8\u6001\u7f51\u9875\uff0c\u53ef\u80fd\u9700\u8981\u4f7f\u7528Selenium<\/code>\u6765\u6a21\u62df\u6d4f\u89c8\u5668\u64cd\u4f5c\u5e76\u83b7\u53d6\u7f51\u9875\u5185\u5bb9\u3002Selenium<\/code>\u662f\u4e00\u4e2a\u7528\u4e8e\u81ea\u52a8\u5316Web\u6d4f\u89c8\u5668\u64cd\u4f5c\u7684\u5e93\uff0c\u53ef\u4ee5\u5904\u7406JavaScript\u751f\u6210\u7684\u5185\u5bb9\u3002<\/p>\n<\/p>\n
\u9996\u5148\uff0c\u9700\u8981\u5b89\u88c5Selenium<\/code>\u548c\u6d4f\u89c8\u5668\u9a71\u52a8\uff0c\u4f8b\u5982Chrome\u9a71\u52a8\uff1a<\/p>\n<\/p>\n
pip install selenium<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u7136\u540e\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u4ee3\u7801\u6765\u83b7\u53d6\u52a8\u6001\u7f51\u9875\u7684\u5185\u5bb9\uff1a<\/p>\n<\/p>\n
from selenium import webdriver<\/p>\n
url = 'https:\/\/example.com'<\/p>\n
driver = webdriver.Chrome()<\/p>\n
driver.get(url)<\/p>\n
html_content = driver.page_source<\/p>\n
driver.quit()<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u83b7\u53d6\u5230\u52a8\u6001\u7f51\u9875\u7684\u5185\u5bb9\u540e\uff0c\u53ef\u4ee5\u50cf\u4e4b\u524d\u4e00\u6837\u4f7f\u7528BeautifulSoup<\/code>\u6765\u89e3\u6790\u548c\u641c\u7d22\u5173\u952e\u8bcd\u3002<\/p>\n<\/p>\n
\u4e03\u3001\u603b\u7ed3<\/h3>\n<\/p>\n
\u901a\u8fc7\u4f7f\u7528requests<\/code>\u3001BeautifulSoup<\/code>\u548clxml<\/code>\uff0c\u53ef\u4ee5\u8f7b\u677e\u5730\u4ece\u9759\u6001\u7f51\u9875\u4e2d\u641c\u7d22\u5173\u952e\u8bcd\u3002\u5bf9\u4e8e\u52a8\u6001\u7f51\u9875\uff0c\u53ef\u4ee5\u4f7f\u7528Selenium<\/code>\u6765\u83b7\u53d6\u5185\u5bb9\u3002\u7ed3\u5408\u6b63\u5219\u8868\u8fbe\u5f0f\uff0c\u53ef\u4ee5\u5b9e\u73b0\u66f4\u590d\u6742\u7684\u641c\u7d22\u9700\u6c42\u3002\u603b\u7684\u6765\u8bf4\uff0cPython\u63d0\u4f9b\u4e86\u4e30\u5bcc\u7684\u5e93\u548c\u5de5\u5177\uff0c\u4f7f\u5f97\u641c\u7d22\u7f51\u7ad9\u5173\u952e\u8bcd\u53d8\u5f97\u7b80\u5355\u9ad8\u6548\u3002<\/p>\n<\/p>\n
\u516b\u3001\u793a\u4f8b\u4ee3\u7801<\/h3>\n<\/p>\n
\u4e0b\u9762\u662f\u4e00\u4e2a\u5b8c\u6574\u7684\u793a\u4f8b\u4ee3\u7801\uff0c\u6f14\u793a\u4e86\u5982\u4f55\u4f7f\u7528requests<\/code>\u548cBeautifulSoup<\/code>\u6765\u641c\u7d22\u7f51\u7ad9\u5173\u952e\u8bcd\uff1a<\/p>\n<\/p>\n
import requests<\/p>\n
from bs4 import BeautifulSoup<\/p>\n
import re<\/p>\n
def search_keywords(url, keyword):<\/p>\n
    response = requests.get(url)<\/p>\n
    html_content = response.text<\/p>\n
    soup = BeautifulSoup(html_content, 'lxml')<\/p>\n
    pattern = re.compile(keyword)<\/p>\n
    tags = soup.find_all(string=pattern)<\/p>\n
    return tags<\/p>\n
url = 'https:\/\/example.com'<\/p>\n
keyword = 'example'<\/p>\n
results = search_keywords(url, keyword)<\/p>\n
for result in results:<\/p>\n
    print(result)<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8fd9\u6bb5\u4ee3\u7801\u5b9a\u4e49\u4e86\u4e00\u4e2asearch_keywords<\/code>\u51fd\u6570\uff0c\u63a5\u53d7\u76ee\u6807URL\u548c\u5173\u952e\u8bcd\u4f5c\u4e3a\u53c2\u6570\uff0c\u8fd4\u56de\u6240\u6709\u5305\u542b\u8be5\u5173\u952e\u8bcd\u7684\u6807\u7b7e\u6587\u672c\u3002\u901a\u8fc7\u8fd9\u79cd\u65b9\u5f0f\uff0c\u53ef\u4ee5\u8f7b\u677e\u5730\u4ece\u7f51\u9875\u4e2d\u63d0\u53d6\u6240\u9700\u7684\u5173\u952e\u8bcd\u3002<\/p>\n<\/p>\n
\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n
 \u5982\u4f55\u4f7f\u7528Python\u6765\u6293\u53d6\u7f51\u7ad9\u7684\u5173\u952e\u8bcd\uff1f<\/strong>
Python\u63d0\u4f9b\u4e86\u591a\u79cd\u5e93\uff0c\u5982BeautifulSoup\u548cScrapy\uff0c\u53ef\u4ee5\u65b9\u4fbf\u5730\u4ece\u7f51\u9875\u4e2d\u63d0\u53d6\u6570\u636e\u3002\u4f7f\u7528BeautifulSoup\u53ef\u4ee5\u89e3\u6790HTML\u5185\u5bb9\u5e76\u63d0\u53d6\u7279\u5b9a\u7684\u6807\u7b7e\u548c\u6587\u672c\uff0c\u8fdb\u800c\u627e\u5230\u7f51\u9875\u4e2d\u7684\u5173\u952e\u8bcd\u3002Scrapy\u5219\u9002\u5408\u4e8e\u5927\u89c4\u6a21\u6293\u53d6\u6570\u636e\uff0c\u652f\u6301\u591a\u7ebf\u7a0b\u548c\u5f02\u6b65\u5904\u7406\uff0c\u80fd\u591f\u9ad8\u6548\u5730\u6293\u53d6\u5927\u91cf\u7f51\u9875\u3002<\/p>\n
\u5728\u4f7f\u7528Python\u6293\u53d6\u5173\u952e\u8bcd\u65f6\uff0c\u9700\u8981\u6ce8\u610f\u54ea\u4e9b\u6cd5\u5f8b\u548c\u4f26\u7406\u95ee\u9898\uff1f<\/strong>
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\u5982\u4f55\u4f18\u5316Python\u811a\u672c\u4ee5\u63d0\u9ad8\u5173\u952e\u8bcd\u641c\u7d22\u7684\u51c6\u786e\u6027\uff1f<\/strong>
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