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django - How can I get the file name from request.FILES?

How can I get the file name from request.FILES in Django?

def upload(request):
    if request.method == 'POST':
        form = UploadForm(request.POST, request.FILES)
        if form.is_valid():
            upload = Upload()
            upload.timestamp = datetime.datetime.now()
            save_instance(form, upload)

I tried using this but it did not work:

  if 'filename'  in request.FILES:
         filename = request.FILES['filename']
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request.FILES['filename'].name

From the request documentation.

If you don't know the key, you can iterate over the files:

for filename, file in request.FILES.iteritems():
    name = request.FILES[filename].name

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