Uploading file from forms

def save_file(file, path=''):
            filename = file._get_name()
            filename_wo_extension_index = filename.find(".")
            filename_wo_extension=filename[0:filename_wo_extension_index]
            #instance.icon = filename_wo_extension
            destination_new = os.path.join(ROOT_DIR, 'arches/Media/images/AssetIcons/')
            os.chdir(destination_new)
            if os.path.exists(destination_new) == "True":
                with open('%s' % filename, "wb+") as destination:
                    for chunk in file.chunks():
                        destination.write(chunk)
            else:
                with open('%s' % filename, "wb+") as destination :
                    for chunk in file.chunks():
                        destination.write(chunk)

            #add support for uploading icon file
        if 'file' in request.FILES:
            save_file(request.FILES['file'])
        else:
            #instance.icon = request.POST.get('icon')
            pass