pandas写入csv，字段行业一直重复怎么解决？？？

Question

import requests
import json
import re
import csv
import pandas as pd

获取每个电影分类链接的函数

def get_movie_type():
url='https://movie.douban.com/chart'
resp=requests.get(url)
result=re.findall(r'(.*?)',resp.text)
return result

获取每种电影前100部:

def get_movie_rank(type_url):
type_url = 'https://movie.douban.com/j/chart/top_list?' + type_url[23:] + '&start=0&limit=100'
resp=requests.get(type_url)
return resp.text

存储

def save(movie):
movie=pd.DataFrame([movie],columns=['类型','电影名称','地区','上映日期','评分','排行','地址'])
movie.to_csv(r'C:\Users\Administrator\Desktop\python\练习\第五周作业_周峰\test3.csv',mode='a',index=None)

def run():

types_url=get_movie_type()
for url in types_url:
    global movie_type_name
    movie_type_name = url[1]
    print('正在储存'+movie_type_name+'类型的电影')
    type_url = url[0]
    result=get_movie_rank(type_url)

    #json解析
    result=json.loads(result)

    #获取所需电影信息

    for massage in result:
        #global title,regions,release_date,score,rank,movieurl
        title=massage['title']
        regions=massage['regions'][0]
        release_date=massage['release_date']
        score=massage['score']
        rank = massage['rank']
        url = massage['url']

        movie=[movie_type_name,title,regions,release_date,score,rank,url]



        # 储存包含电影信息
        save(movie)
    print(movie_type_name + '的类型储存完毕！')

run()

Answer 1

    with open("demo.csv", "a+", encoding='utf-8', newline="") as f:
        k = csv.writer(f, delimiter=',')
        with open("demo.csv", "r", encoding='utf-8', newline="") as f1:
            reader = csv.reader(f1)
            if not [row for row in reader]:
                k.writerow(['品牌索引', '品牌名称', '车系名称', '车型', '汽车型号', '指导价', '参考价', '经销商名称',
                            '地区', '简称', '地址', '销售区域', '电话1', '电话2', '时间'])
                k.writerows(data)
                print('第[{}]条数据插入成功'.format(self.count))
            else:
                k.writerows(data)
                print('第[{}]条数据插入成功'.format(self.count))


自己对应着改一下参数吧，这段代码的意思就是写入数据前会判断有没有表头没有就写入，有就不写