页面换页得到的是最后一页的数据

import requests
from bs4 import BeautifulSoup
import csv

domain = "http://www.100ppi.com/mprice/"
lis = [
    "mlist-1--1.html"
    "mlist-1--2.html"
    "mlist-1--3.html"
    "mlist-1--4.html"
    "mlist-1--5.html"
    "mlist-1--6.html"
    "mlist-1--7.html"
    "mlist-1--8.html"
    "mlist-1--9.html"
    "mlist-1--10.html"
]
f = open("大宗商品.csv", mode="a", newline='')  
csvwriter = csv.writer(f)
for i in lis:
    url = domain + i
    try:
        headers = {
            "User-Agent":"Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.25 Safari/537.36 Core/1.70.3870.400 QQBrowser/10.8.4405.400"
        }
        resp = requests.get(url)
        resp.raise_for_status()
        resp.encoding = resp.apparent_encoding
        #print(resp.text)
    except:
        print("F")


    page = BeautifulSoup(resp.text, "html.parser")



    shangping = page.find("div", attrs = {"class":"block clearfix ovh"})
    trs = shangping.find_all("tr")[1:] 
    for tr in trs: 
        tds = tr.find_all("td")
        name = tds[0].text.strip()
        type = tds[1].text.strip()
        brand = tds[2].text.strip()
        price = tds[3].text.strip()
        price_type = tds[4].text.strip()
        adress = tds[5].text.strip()
        bill = tds[6].text.strip()
        time = tds[7].text.strip()
        #print(name, type, brand, price, price_type, adress, bill, time)
        csvwriter.writerow([name, type, brand, price, price_type, adress, bill, time])

f.close()
print("over!")

代码运行后在csv中得到的是最后一页的数据，求解答