Python script crawl and Get MS-Build download links

build.py

# Download this file and put it beside this script file: 
# https://channel9.msdn.com/Events/Build/2017/rss
import re
with open('rss.txt', 'r') as myfile:
    data=myfile.read().replace('\n', '')
txt='';ret = re.findall(r"url=\"(\S+?)\.mp4\"",data)
for l in ret:
    if '_mid' in l:
        txt+=l+'.mp4\n'
f=open('link.txt', 'w')
f.writelines(txt)
f.close()