这次作业主要练习写入操作，普通基础的爬虫工作做好之后, 可以进行数据分析等等工作，所以爬虫好的数据就要进行写入操作。直接以糗事百科的爬虫当拿手的例子。Talk is cheap, talk is cheap show me the code.

import requests
import csv
from bs4 import BeautifulSoup

html = requests.get('http://www.qiushibaike.com/text/').content
soup = BeautifulSoup(html,'lxml')
links = soup.find_all('div',class_='content')

csvfile = open("qiushi.csv","a") 
writer = csv.writer(csvfile)
for link in links:
 print(link.span.get_text())
 writer.writerow([link.span.get_text()])