Requests库网络爬虫实战

Posted 2020-11-25 py2019

实例一：京东商品页面的爬取

import requests
url = "https://item.jd.com/100004770237.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")　

实例二：亚马逊商品页面的爬取

import requests
url = "https://www.amazon.cn/dp/B071HXVPXG/ref=lp_659039051_1_2?s=books&ie=UTF8&qid=1580353560&sr=1-2"
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")　

实例三：百度360搜索关键词提交

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")

备注：搜索引擎关键词提交接口

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

实例四：网络图片的爬取和存储

import requests
import os
url = "http://img1.3lian.com/2015/w7/97/d/25.jpg"
#设置爬取图片的存储位置及名称，名称可以使用图片原有的名称也可以自定义
root = "E://python//"
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("文档保存成功")
    else:
        print("文件已经存在在")
except:
    print("爬取失败")
        

实例五：IP地址归属地的自动查询

import requests
url = "http://m.ip138.com/ip.asp?ip="
try:
    r = requests.get(url+‘202.204.80.112‘)
    r.raise_for_status()
    r.encoding = r.apparent_encoding
    print(r.text[-500:])
except:
    print("爬取失败")