code: def qlb(self, w, r):
      if self.duals is None:
          self.recomputeduals()
  
          assert self.duals is not None
  
      return (
          self.duals[1][0]["qfunc"](1, w, r)
          if self.duals[1][0] is not None
          else 1
      )
  
imports: from math import inf
label_desc: Use image node_id 5 for calling the OnlineCressieRead obj's underlying member method code with example usage: obj.qlb(w, r) and returns: unknown