已經(jīng)在cmd pip install requests了 為什么還會報錯 服務器也啟動了

response?=?requests.get('https//:127.0.0.1:8000')
content?=?str(response.content,?encoding='utf-8')?#?==>?打印具體內(nèi)容
content_list?=?content.split('\n')?#?分行
for?line?in?content_list:
????if?'href'?in?line?and?'www'?in?line:
????????print(line.strip())

Traceback (most recent call last):

? File "D:\python\work\main.py", line 2, in <module>

? ? response = requests.get('https//:127.0.0.1:8000')

NameError: name 'requests' is not defined