code: def update(self, c, w, r):
      if c > 0:
          assert (
              w + 1e-6 >= self.wmin and w <= self.wmax + 1e-6
          ), "w = {} < {} < {}".format(self.wmin, w, self.wmax)
          assert r >= 0 and r <= 1, "r = {}".format(r)
  
          decay = self.tau**c
          self.n = decay * self.n + c
          self.sumw = decay * self.sumw + c * w
          self.sumwsq = decay * self.sumwsq + c * w**2
          self.sumwr = decay * self.sumwr + c * w * r
          self.sumwsqr = decay * self.sumwsqr + c * (w**2) * r
          self.sumwsqrsq = decay * self.sumwsqrsq + c * (w**2) * (
              r**2
          )
  
          self.duals = None
          self.mleduals = None
  
      return self
  
imports: from math import inf
label_desc: Use image node_id 3 for calling the OnlineCressieRead obj's underlying member method code with example usage: obj.update(c, w, r) and returns: self