数据分析——Requests库网络爬取实战

Requests库网络爬取实战

实例1：京东商品页面的爬取

import requests
url = "https://item.jd.com/100007136939.html"
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])
except:
    print("爬取失败")

京东也拒绝爬虫，需要将代理名改为服务器了

实例2：百度/360搜索关键词提交

#baidu
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")

#360
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3：网络图片的爬取和存储

import requests
import os
url = "http://file06.16sucai.com/2018/0330/61064182a59d797418c44af840cc1f23.jpg"
root = "D://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("文件已存在")
except:
    print("爬取失败")

吐槽
现在网站哪能找到jpg结尾的网址，都被隐藏了。

实例4：IP地址归属地的自动查询

import requests
url = 'https://m.ip138.com/iplookup.asp?ip='
try:
    kv = {
    
    'user-agent': 'chrome/10'}
    r = requests.get(url + '202.204.80.112', headers=kv)
    r.raise_for_status()
    r.encoding = r.apparent_encoding
    print(r.text[-500:])
except:
    print("爬取失败")

注：这个出错了，出错我也没看懂，写在这记录一下

修改以后，附带参考文章https://blog.csdn.net/weixin_44578172/article/details/109376326

import requests

def getHTMLText(url):
    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[2000:3000])#分片查看相应字节
    except:
        print("爬取失败")

def main():
    a=input("请输入要查询的IP地址：")
    url='https://ipchaxun.com/'+a
    getHTMLText(url)

main()

运行结果

小结：
大家看的课程都一样呀，哈哈哈哈，加油