code: def get(self, name, default=_MISSING):
          
          name = self._convert_name(name)
          if name not in self._fields:
              if default is _MISSING:
                  default = self._default_value(name)
              return default
          if name in _UNICODEFIELDS:
              value = self._fields[name]
              return value
          elif name in _LISTFIELDS:
              value = self._fields[name]
              if value is None:
                  return []
              res = []
              for val in value:
                  if name not in _LISTTUPLEFIELDS:
                      res.append(val)
                  else:
                      # That's for Project-URL
                      res.append((val[0], val[1]))
              return res
  
          elif name in _ELEMENTSFIELD:
              value = self._fields[name]
              if isinstance(value, string_types):
                  return value.split(',')
          return self._fields[name]
docs: Get a metadata field.