code: def get_category(category_string, model=Category):
      
      model_class = get_cat_model(model)
      category = str(category_string).strip("'\"")
      category = category.strip('/')
  
      cat_list = category.split('/')
      if len(cat_list) == 0:
          return None
      try:
          categories = model_class.objects.filter(name=cat_list[-1], level=len(cat_list) - 1)
          if len(cat_list) == 1 and len(categories) > 1:
              return None
          # If there is only one, use it. If there is more than one, check
          # if the parent matches the parent passed in the string
          if len(categories) == 1:
              return categories[0]
          else:
              for item in categories:
                  if item.parent.name == cat_list[-2]:
                      return item
      except model_class.DoesNotExist:
          return None
docs: Convert a string, including a path, and return the Category object