我们经常会在提交代码到github或访问时，发现会因为网络问题无法访问。

解决办法如下：

1. 在https://www.ipaddress.com/获取以下地址的IP：

   github.com
   github.global.ssl.fastly.net
   assets-cdn.github.com

简单写了个Python代码自动获取以上地址的IP：

import re
import requests
from bs4 import BeautifulSoup

websites = ["github.com",
            "github.global.ssl.fastly.net",
            "assets-cdn.github.com"
            ]

# 执行所有的HTML页面的解析
all_datas = []
htmls = []
for website in websites:
url = f"https://ipaddress.com/website/%s" % website  # 页面链接
print("craw html:", url)
r = requests.get(url)

    soup = BeautifulSoup(r.text, 'html.parser')
    ip_info = (
        soup.find_all("tbody", id="dnsinfo")
    )
    info = ip_info[0].find_all("a")
    for i in info:
        ip = i.get_text()
        if re.search(r'[a-z]', ip) != None:
            break
        all_datas.append(ip+" " + website)

print(all_datas)

with open("hosts.txt", "w") as fout:
    for data in all_datas:
        fout.writelines(data + "\n") `

2. 进入mac终端，执行vi /etc/hosts，输入密码后，按i进入编辑，在最后加入以下内容：

   140.82.113.4 github.com
   199.232.69.194 github.global.ssl.fastly.net
   185.199.108.153 assets-cdn.github.com
   185.199.109.153 assets-cdn.github.com
   185.199.110.153 assets-cdn.github.com
   185.199.111.153 assets-cdn.github.com

以上内容加入后，按esc退出编辑，并输入:wq进行保存并退出