球问爬取到的数据怎么保存到本地文件

Question

from bs4 import BeautifulSoup
import requests
userSeach='pr'
page=1
viedoNum=0
val=0
mainUrl='https://search.bilibili.com/all?keyword=%27+userSeach
mainSoup = BeautifulSoup(requests.get(mainUrl).text, "html.parser")
pages=mainSoup.find('li',class_="page-item last")
with open('test.txt', 'w', encoding='utf-8') as f:
if(pages):
pages=int(pages.text)
else:
pages=1
while page<=pages:
mainUrl='https://search.bilibili.com/all?keyword=%27+userSeach+%27&page=%27+page.__str__()
mainSoup = BeautifulSoup(requests.get(mainUrl).text, "html.parser")
for item in mainSoup.find_all('li',class_="video-item matrix"):
viedoNum += 1
print('第'+ viedoNum.str() + '个视频:')
val=item.find('a',class_="img-anchor")
print('视频标题:'+ val["title"])
print('视频链接:'+'https:'+val["href"])
print('视频简介:'+item.find('div',class_="des hide").text.strip())
print('up主:'+ item.find('a',class_="up-name").text.strip())
print('视频观看量:'+ item.find('span',title='观看').text.strip())
print('弹幕量:'+ item.find('span',title='弹幕').text.strip())
print('上传时间:'+ item.find('span',title='上传时间').text.strip())
subUrl=val["href"];
subSoup = BeautifulSoup(requests.get('https:'+subUrl).text.strip(), "html.parser")
print('视频图片:'+subSoup.find(itemprop="image")["content"])
page+=1
f.write()

Txt文件存储和CSV的文件存储的方式都可以，怎么改啊？