Saving Ndarray to InMemoryUploadedFile

이미지를 조작하는 ndarray에서 모델에 저장하기 위해 inmemoryuploadedfile 형태로 바꿔야하는 경우가 있다. 

http://stackoverflow.com/questions/3723220/how-do-you-convert-a-pil-image-to-a-django-file

import StringIO

from django.core.files.uploadedfile import InMemoryUploadedFile

# Create a file-like object to write thumb data (thumb data previously created

# using PIL, and stored in variable 'thumb')

thumb_io = StringIO.StringIO()

thumb.save(thumb_io, format='JPEG')

# Create a new Django file-like object to be used in models as ImageField using

# InMemoryUploadedFile.  If you look at the source in Django, a

# SimpleUploadedFile is essentially instantiated similarly to what is shown here

thumb_file = InMemoryUploadedFile(thumb_io, None, 'foo.jpg', 'image/jpeg',

                                  thumb_io.len, None)

# Once you have a Django file-like object, you may assign it to your ImageField

# and save.

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