```python
import requests
if __name__ == "__main__":
headers = {
'User_Agent':'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/95.0.4638.54 Safari/537.36 Edg/95.0.1020.40 '
}
url = 'https://www.sogou.com/web?'
kw = input("enter a word:")
fengzhuang = {
'query': kw
}
response = requests.get(url=url, params=fengzhuang, headers=headers)
page_text = response.text
filename = kw+'.html'
with open(filename, 'w', encoding='utf-8') as fp:
fp.write(page_text)
print(filename, "抓取成功。")
```