案例1：京东商品页面的爬取
import requests
url = "https://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")
案例2：亚马逊商品页面的爬取
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")
案例3：百度360关键词提交
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
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")
案例4：网络图片的爬取和存储
网络图片链接的格式：http://www.example.com/picture.jpg
国家地理
选择一个图片Web页面：
http://www.nationalgeographic.com.cn/photography/photo_of_the_day/3921.html
该图片地址：http://image.nationalgeographic.com.cn/2017/0211/20170211061910157.jpg
import requests
import os
url = "http://image.nationalgeographic.com.cn/2017/0211/20170211061910157.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")
案例5：IP地址归属地的自动查询
http://m.ip138.com/ip.asp?ip=ipaddress
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")
