Hkpery的博客

对于scrapy框架的初步了解Scrapy Engine(引擎):负责Spider、ItemPipeline、Downloader、Scheduler中间的通讯，信号、数据传递等。Scheduler(调度器): 它负责接受引擎发送过来的Request请求，并按照一定的方式进行整理排列，入队，当引擎需要时，交还给引擎。Downloader（下载器）：负责下载ScrapyEngine(引擎)发送的所有Requests请求，并将其获取到的Responses交还给ScrapyEngine(

python异常处理篇方法1#们抓取网页一般需要对 headers（网页头信息）进行模拟，这时候需要使用到 urllib.request.Request 类from urllib.urllib import Request,urlopenfrom urllib.error import URLError,HTTPErrorreq = Request(url)try: response = urlopen(req)except HTTPError as c: print('The serve

如果你也喜欢猫猫(>ω<)喵import urllib.requestimport randomimport timeheight = random.randint(1,1024)weight = random.randint(1,1024)new_url='http://placekitten.com/'+str(height)+'/'+str(weight)ip_list=['14.116.213.100:8081','14.18.109.42:8081','47.10

动态爬取网页图片纯原码import urllib.requestimport osimport randomimport re"""def url_open(url): ip_list=['14.116.213.100:8081','14.18.109.42:8081','47.107.128.69:888','47.108.155.96:80','183.7.29.244:9999','36.57.68.239:8888','171.15.65.120:8080']