code: def _parse_normalizations(self, normalizations):
          
          parsed_normalizations = []
  
          if isinstance(normalizations, list):
              for item in normalizations:
                  normalization = self._parse_normalization(item)
                  if normalization:
                      parsed_normalizations.append(normalization)
          else:
              raise ConfigError('List expected. Found %s' % type(normalizations))
  
          return parsed_normalizations
docs: Returns a list of parsed normalizations.
  
          Iterates over a list of normalizations, removing those
          not correctly defined. It also transform complex items
          to have a common format (list of tuples and strings).
  
          Args:
              normalizations: List of normalizations to parse.
  
          Returns:
              A list of normalizations after being parsed and curated.