manevant

import requests

def checkName(name):
	values = { "new_username" : name }
	r = requests.post("https://login.skype.com/json/validator", values)
	return "not available" in r.json()[u'data'][u'markup']

manevant

    if not article.is_visible or not article.is_moderate:

        is_author = article.author == request.user
        if request.user.is_admin or request.user.is_staff or is_author:
            pass
        else:
            raise PermissionDenied


#EDITED

manevant

if form.is_valid():
            original_name, extension = os.path.splitext(form.cleaned_data['file'].name)  # расширение файла из формы
            path = os.path.join(settings.MEDIA_ROOT, DIR)
            file_name = image_name_resolver(path)  # принимает путь, отдаёт верное имя(без расширения) для файла
            complete_name = file_name + extension

...

def image_name_resolver(path):
    '''