python urllib3 download file
import requests
print('Beginning file download with requests')
url = 'http://i3.ytimg.com/vi/J---aiyznGQ/mqdefault.jpg'
r = requests.get(url)
with open('/Users/scott/Downloads/cat3.jpg', 'wb') as f:
f.write(r.content)
# Retrieve HTTP meta-data
print(r.status_code)
print(r.headers['content-type'])
print(r.encoding)