code: def copy(self):
          
          fs = self.__class__.__new__(self.__class__)
          fs.__dict__ = self.__dict__.copy()
          fs._frameSet = None
          if self._frameSet is not None:
              fs._frameSet = self._frameSet.copy()
          return fs
docs: Create a deep copy of this sequence
  
          Returns:
              :obj:`.FileSequence`: