code: def series(self):
          '''Generator of single series data (no dates are included).'''
          data = self.values()
          if len(data):
              for c in range(self.count()):
                  yield data[:, c]
          else:
              raise StopIteratiof series(self):
          '''Generator of single series data (no dates are included).'''
          data = self.values()
          if len(data):
              for c in range(self.count()):
                  yield data[:, c]
          else:
              raise StopIteration
docs: Generator of single series data (no dates are included).