Can you please explain what this function does?

Question

Django

Greetings. Can you please explain what this piece of code does?
Interested in the moment with with open .... and the cycle itself

def upload_picture(request):
    try:
        f = request.FILES['picture']
        filename = django_settings.MEDIA_ROOT + '/profile_pictures/' + request.user.username + '_tmp.jpg'
        with open(filename, 'wb+') as destination:
            for chunk in f.chunks():
                destination.write(chunk)
            pass
            .....

Thanks to

Answer 1

when uploading, the file usually comes not in its entirety, but in pieces,
so the file is collected,
this code collects the file from pieces ,
but it is better to use it through the form for the model

form = ImageForm(request.POST, request.FILES)
if form.is_valid():
    form.save()

and clearer and easier

Answer 2

https://docs.djangoproject.com/en/1.10/topics/http...