Requests Library exercise

Example one: Jingdong item page crawling
 Import Requests 
URL = "http://item.jd.com/2967929.html" 
the try: 
    R & lt requests.get = (URL) 
    r.raise_for_status () 
    r.encoding = r.apparent_encoding 
    Print (r.text [: 1000]) 
the except: 
    Print ( "crawling failure") 
example 2: Amazon item page crawling
 Import Requests 
URL = "https://www.amazon.cn/gp/product/B01M8L5Z3Y" 
the try: 
    = {kV 'user_agent': 'the Mozilla / 5.0'} 
    R & lt requests.get = (URL, headers = kV) 
    r.raise_for_status () 
    R & lt, encoding = r.apparent_encoding 
    Print (r.text [1000: 2000]) 
the except: 
    print ( "crawling failure") 
example III: Submit Baidu / search key 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")
the except: 
    Print ( "crawling failure") 
Example five: IP address of the home automatic query
 Import Requests 
URL = "http://m.ip138.com/ip.asp?ip=" 
the try: 
    R & lt requests.get = ( + URL '202.204.80.112') 
    r.raise_for_status () 
    r.encoding = r.apparent_encoding 
    Print (r.text [-500:]) 
the except: 
    Print ( "crawling failure")