萌新淘宝定向爬取商品信息遇到了问题

import requests
import re

def getHTMLText(url):
{"cookie":'',
    "user-agent":"Mozilla/5.0"}
    try:
        r = requests.get(url, headers = kv, timeout = 30)
        r.raise_for_status()
        r.encoding = r.apparent_encoding
        return r.text
    except:
        return ""

def parsePage(ilt, html):
    try:
        plt = re.findall(r'"view_price"\:"[\d\.]*"', html)
        tlt = re.findall(r'"raw_title"\:".*?"', html)
        for i in range(len(plt)):
            price = eval(plt[i].split(':')[1])
            title = eval(tlt[i].split(':')[1])
            ilt.append([price, title])
    except:
        print("")

def printGoodsList(ilt):
    tplt = "{:4}\t{:8}\t{:16}"
    print(tplt.format("序号", "价格", "商品名"))
    count = 0
    for g in ilt:
        count = count + 1
        print(tplt.format(count, g[0], g[1]))

def main():
    goods = '书包'
    depth = 2
    start_url = 'http://s.taobao.com/search?q=' + goods
    infoList = []
    for i in range(depth):
        try:
            url = start_url + '&s=' + str(44*i)
            html = getHTMLText(url)
            parsePage(infoList, html)
        except:
            continue
    printGoodsList(infoList)
    
main()

def getHTMLText(url):
kv = {"cookie":'',
    "user-agent":"Mozilla/5.0"}
    try:
        r = requests.get(url, headers = kv, timeout = 30)
        r.raise_for_status()
        r.encoding = r.apparent_encoding
        return r.text
    except:
        return ""