月度投资者数量

import requests
from lxml import etree
from bs4 import  BeautifulSoup
import  csv
url = 'http://www.chinaclear.cn/cms-search/monthview.action?action=china&channelFidStr'

res = requests.get(url)
res.encoding = res.apparent_encoding
data = etree.HTML(res.text)

copy = '//*[@id="settlementList"]/table/tbody/tr/td/table/tbody/tr[{}]/td[2]/p/span//text()'    #可用格式化{}操作，其实数量少的话不如直接多写几个，还不用循环

data_dict =[]

f = open('e:\\shuju\\3.csv', 'w', newline="")
writer = csv.writer(f)
writer.writerow(('riqi', 'xinzeng', 'qimo'))
for i in range(1,4):
    das = data.xpath(copy.format(i))
    das = ''.join(das).replace('[','').replace(']','').replace("'",'')    #把多余的括号去掉
    data_dict.append(das)


writer.writerow((data_dict))
f.close()