python爬虫——当当网商品比价爬虫

因为淘宝网需要登录，而京东的html比较奇怪，所以最后选取了当当网

技术路线

requests——re

#CrowDangDangPrize.py
import requests
import re
import urllib
def getHTMLText(url):
    try:
        r=requests.get(url,timeout=30)
        r.raise_for_status()
        r.encoding=r.apparent_encoding
        return r.text
    except:
        return ""

def parsePage(ls,html):
    try:
        pls=re.findall(r'now\_price\"\>\&yen\;[\d\.]+',html)
        nls=re.findall(r"alt\=\'.*?\'",html)
        for i in range(len(pls)):
            price=eval(pls[i].split(';')[1])
            name=eval(nls[i].split("=")[1])
            ls.append([price,name<