如何用Python编写针对runoob网站的长尾关键词爬虫？

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javascriptimport cheerio from 'cheerio';import request from 'sync-request';import fs from 'fs';import process from 'process';

const url=process.argv[2];if (!url) { console.log('请指定页面。'); process.exit(1);}

const ofile=fs.openSync('output.txt', 'w');

runoob.js

var cheerio = require('cheerio'); var request = require('sync-request'); var fs = require('fs'); var process = require('process'); var url = process.argv[2]; if(!url) { console.log('请指定页面。