Requests库练习

实例一：京东商品页面爬取
import requests
url = "http://item.jd.com/2967929.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：亚马逊商品页面爬取
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")
实例三：百度/360搜索关键字提交
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")
实例四：网络图片的爬取和存储
import requests
import os
url = ""
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("sucess")
    else:
        print("cunzai")
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")