엘셀 파일을 만들기 위해 get_news('삼성전자')를 입력했는데, 아래 이미지와 같이 Name Error가 발생하였습니다.

어디서 부터 잘못 따라한걸까요?

작성한 코드 및 에러 메세지

import requests

from bs4 import BeautifulSoup

from openpyxl import workbook

def get_news(keyword):

   wb= Workbook()

   sheet = wb.active

   headers = {'User-Agent' : 'Mozilla/5.0 (Windows NT 10.0; Win64; x64)AppleWebKit/537.36 (KHTML, like Gecko) Chrome/73.0.3683.86 Safari/537.36'}

   data = requests.get('https://search.naver.com/search.naver?where=news&ie=utf8&sm=nws_hty&query=삼성전자',headers=headers)

   soup = BeautifulSoup(data.text, 'html.parser')

   lis = soup.select('#main_pack > section > div > div.group_news > ul > li')

   for li in lis:

      a = li.select_one('a.news_tit')

      row = [a.text, a['href']]

      sheet.append(row)

      wb.save(f"{keyword}.xlsx")

      wb.close()

Error Messaage

NameError                                 Traceback (most recent call last)
<ipython-input-15-82724b372f00> in <cell line: 1>()
----> 1 get_news('삼성전자')

<ipython-input-12-380fd9cd9b22> in get_news(keyword)
      5 
      6 def get_news(keyword):
----> 7    wb= Workbook()
      8    sheet = wb.active
      9 

NameError: name 'Workbook' is not defined