刚学爬虫，这里就卡住了，为啥生成的文件名一直是filenam？

import requests
if __name__=='__main__':
url= kk=input('enter a word: ')
filename=kk+'.html'
param={
'query':kk
}
headers={'User-Agent': "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.198 Safari/537.36"}#ua伪装
response=requests.get(url=url,params=param,headers=headers)
page_text= print(page_text)
with open('filename','w',encoding='utf-8') as fp:
fp.write(page_text)
print(filename,'保存成功！！！')
这里filename明明是变量文件名，随着输入变化，，好恶心啊，看着视频里的老师通过没问题，到我这就有问题了