gist.py

def _save_categories(curso_id_in_supplier, category):
    from shop.models import Category, CourseCategories, Course

    c_c = CourseCategories()
    c_c.course = Course.objects.get(id_in_supplier=curso_id_in_supplier, supplier=IOB)
    try:
        c_c.category = Category.objects.get(slug=category)
    except Category.DoesNotExist:
  	ct = Category()
		ct =  category
		ct.save()
	    c_c.category = ct
	except Category.MultipleObjectsReturned:
        c_c.category = Category.objects.filter(slug=category)[0]

    cc, created = CourseCategories.objects.get_or_create(course=c_c.course,
                  category=c_c.category)
    return cc