python爬虫mooc Python网络爬虫信息提取mooc代码实例
159566 人气:0实例一--爬取页面
import requests url="https//itemjd.com/2646846.html" try: r=requests.get(url) r.raise_for_status() r.encoding=r.apparent_encoding print(r.text[:1000]) except: print("爬取失败")
正常页面爬取
实例二--爬取页面
import requests url="https://www.amazon.cn/gp/product/B01M8L5Z3Y" try: kv={'user-agent':'Mozilla/5.0'} r=requests.get(url,headers=kv) r.raise_for_status() r.encoding=r.apparent_encoding print(r.text[1000:2000]) except: print("爬取失败")
对访问用户名有限制,模拟浏览器对网站请求
实例三--爬取搜索引擎
#百度的关键词接口:http://www.baidu.com/s?wd=keyword #360的关键词接口:http://www.so.com/s?q=keyword import requests keyword="python" try: kv={'wd':keyword} r=requests.get("http://www.baidu.com/s",params=kv) print(r.request.url) r.raise_for_status() print(len(r.text)) except: print("爬取失败") -------------------------------------------------- import requests keyword="python" try: kv={'q':keyword} r=requests.get("http://www.so.com/s",params=kv) print(r.request.url) r.raise_for_status() print(len(r.text)) except: print("爬取失败")
实例四--:爬取图片
import requests import os url="http://image.nationalgeographic.com.cn/2017/0211/20170211061910157.jpg" root="F://pics//" path=root+url.split('/')[-1] try: if not os.path.exists(root): os.mkdir(root) if not os.path.exists(path): r=requests.get(url) with open(path,'wb') as f: f.write(r.content) f.close() print("文件保存成功") else: print("文件已经存在") except: print("爬取失败")
爬取并保存图片
实例五--IP地址归属地查询:
http://m.ip138.com/ip.asp?ip=ipaddress
url="http://www.ip138.com/iplookup.asp?ip=" try: r=requests.get(url+'202.204.80.112'+'&action=2') r.raise_for_status() r.encoding=r.apparent_encoding print(r.text[-500:]) except: print("爬取失败")
加载全部内容