code: def copy(self, deep=False):
          
          if deep:
              return deepcopy(self)
          return super(DataQualityDict, self).copy()
docs: Build a copy of this dictionary.
  
          Parameters
          ----------
          deep : `bool`, optional, default: `False`
              perform a deep copy of the original dictionary with a fresh
              memory address
  
          Returns
          -------
          flag2 : `DataQualityFlag`
              a copy of the original dictionary