code: def add(self, name, description):
          
          filter_map = dict()
          filter_map['name'] = name
          filter_map['description'] = description
  
          code, xml = self.submit({'filter': filter_map}, 'POST', 'filter/')
  
          return self.response(code, xml)
docs: Inserts a new Filter and returns its identifier.
  
          :param name: Name. String with a maximum of 100 characters and respect [a-zA-Z\_-]
          :param description: Description. String with a maximum of 200 characters and respect [a-zA-Z\_-]
  
          :return: Following dictionary:
  
          ::
  
              {'filter': {'id': < id >}}
  
          :raise InvalidParameterError: The value of name or description is invalid.
          :raise FilterDuplicateError: A filter named by name already exists.
          :raise DataBaseError: Networkapi failed to access the database.
          :raise XMLError: Networkapi failed to generate the XML response.