Django save uploaded file to disk

gistfile1.py

from django.core.files.temp import NamedTemporaryFile
from django.core.files.base import ContentFile
from django.core.files.storage import default_storage

# if you actually need the file
class MyMixin(object):
  def pre_save(self, obj):
    default_storage.save('/Users/2ndmouse/code/media/a.jpg', ContentFile(self.request.FILES['image'].read()))
    
# download online file and save it to image field
import urllib2
from urlparse import urlparse
class DownloadOnlineFileMixin(object):
  def pre_save(self, obj):
    imgUrl = 'https://avatars1.githubusercontent.com/u/6585995?s=140'
    tmpImg = NamedTemporaryFile(delete=True) # automatically delete the file once it is closed
    tmpImg.write(urllib2.urlopen(imgUrl).read())
    tmpImg.flush() # prevent file truncate
    o = urlparse(imgUrl)
    filename = basename(o.path)
    imgFile = File(tmpImg)
    obj.image.save(filename, imgFile) # save the file into image field
    # doing something cool with the image her ...
    tmpImg.close()