image KeyError

hi there , so i am not sure if i am doing this the right way, but im successfully able to upload files(images) and store them in my defined folder  and the link in my mysql  database.

 the error comes when i try to return the image with the HTTP RESPONSE were i get a image keyError.. i am not sure wht i am doing wrong.. 

here is my code:

def handle_uploaded_file(f,u):

    profile=u.get_profile()

    profile.avatar=f.name

    destination = open('images/users/'+f.name, 'wb+')

    for chunk in f.chunks():

        destination.write(chunk)

    destination.close()

    profile.save()

def upload_file(request,user_id):

    u = get_object_or_404(User, pk=user_id)

    if request.method == 'POST':

        form = UploadFileForm(request.POST, request.FILES)

        if form.is_valid():

            handle_uploaded_file(request.FILES['file'],u)   

            uploadedImage = form.cleaned_data['image'] 

            

            return HttpResponse(uploadedImage.content,mimetype="image/jpeg")

    else:

        form = UploadFileForm()

    c = {'form': form,'user' : u}

    c.update(csrf(request))

    return render_to_response('accounts/upload.html', c) 

<form enctype="multipart/form-data" method="post" action="/accounts/{{ user.id }}/upload/">

   {% csrf_token %}   

   <table>

       {{form.as_table}}

    </table>

    <input type="submit" value="Submit" id="Save"/>

</form>

thanks in advance

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