python爬虫之单线程爬取菜价

import requests, csv

url = "http://www.xinfadi.com.cn/getPriceData.html"
headers = {
    "User-Agent": "Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/96.0.4664.45 Safari/537.36",
    "Referer": "http://www.xinfadi.com.cn/priceDetail.html"
}
f = open("data.csv", mode="w", encoding="utf-8")
csvwriter = csv.writer(f)
for i in range(1,13845):
    data = {
        "limit": "20",
        "current":i
    }
    resp = requests.post(url, headers=headers, data=data)
    list = resp.json().get('list')
    for dic in list:
        txt=(dic.get("prodCat"), dic.get("prodName"), dic.get("lowPrice"), dic.get("avgPrice"),
            dic.get("highPrice"), dic.get("specInfo"), dic.get("place"), dic.get("unitInfo"), dic.get("pubDate"))
        csvwriter.writerow(txt)
    print("下载完第",i,"页")