code: def apply_changes(self, other, with_buffer=False):
          
          self.rs.update(other.buffer)
          if with_buffer:
              self.buffer = other.buffer.copy()
docs: Applies updates from the buffer of another filter.
  
          Params:
              other (MeanStdFilter): Other filter to apply info from
              with_buffer (bool): Flag for specifying if the buffer should be
                  copied from other.
  
          Examples:
              >>> a = MeanStdFilter(())
              >>> a(1)
              >>> a(2)
              >>> print([a.rs.n, a.rs.mean, a.buffer.n])
              [2, 1.5, 2]
              >>> b = MeanStdFilter(())
              >>> b(10)
              >>> a.apply_changes(b, with_buffer=False)
              >>> print([a.rs.n, a.rs.mean, a.buffer.n])
              [3, 4.333333333333333, 2]
              >>> a.apply_changes(b, with_buffer=True)
              >>> print([a.rs.n, a.rs.mean, a.buffer.n])
              [4, 5.75, 1]