r = requests.get("http://200.20.3.20:8080/job/Compile/job/aaa/496/artifact/bbb.iso")
 
with open(os.path.join(os.path.dirname(os.path.abspath("__file__")),"bbb.iso"),"wb") as f:
  f.write(r.content)

import urllib2
print "downloading with urllib2"
url = '"http://200.21.1.22:8080/job/Compile/job/aaa/496/artifact/bbb.iso"'
f = urllib2.urlopen(url)
data = f.read()
with open(os.path.join(os.path.dirname(os.path.abspath("__file__")),"bbb.iso"),"wb") as f:
  f.write(data)