code: def deviation(self, series, start, limit, mean):
          '''
          :type start: int
          :type limit: int
          :type mean: int
          :rtype: list()
          '''
          d = []
          for x in range(start, limit):
              d.append(float(series[x] - mean))
          return f deviation(self, series, start, limit, mean):
          '''
          :type start: int
          :type limit: int
          :type mean: int
          :rtype: list()
          '''
          d = []
          for x in range(start, limit):
              d.append(float(series[x] - mean))
          return d
docs: :type start: int
          :type limit: int
          :type mean: int
          :rtype: list()