案例1：京東商品頁面的爬取
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("爬取失敗")
案例2：亞馬遜商品頁面的爬取
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("爬取失敗")
案例3：百度360關(guān)鍵詞提交
搜索引擎關(guān)鍵詞提交接口
百度的關(guān)鍵詞接口：http://www.baidu.com/s?wd=keyword
360的關(guān)鍵詞接口：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("爬取失敗")
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("爬取失敗")
案例4：網(wǎng)絡(luò)圖片的爬取和存儲
網(wǎng)絡(luò)圖片鏈接的格式：http://www.example.com/picture.jpg
國家地理
選擇一個圖片Web頁面：
http://www.nationalgeographic.com.cn/photography/photo_of_the_day/3921.html
該圖片地址：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("爬取失敗")
案例5：IP地址歸屬地的自動查詢
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("爬取失敗")
