谁来跟我解释一下这什么意思

代码
import requests

a=requests.get(www.baidu.com)
print(a)
报错
Traceback (most recent call last):
File "/data/user/0/coding.yu.pythoncompiler.new/files/default.py", line 3, in
a=requests.get(www.baidu.com)
NameError: name 'www' is not defined

[Process completed (code 1) - press Enter]

#!/usr/bin/python
# -*- coding: UTF-8 -*-
"""
@author: Roc-xb
"""
import requests

html=requests.get("https://www.baidu.com").text
print(html)