code: def conflicted_vars(self, current):
          "Return a list of variables in current assignment that are in conflict"
          return [var for var in self.vars
                  if self.nconflicts(var, current[var], current) > 0f conflicted_vars(self, current):
          "Return a list of variables in current assignment that are in conflict"
          return [var for var in self.vars
                  if self.nconflicts(var, current[var], current) > 0]
docs: Return a list of variables in current assignment that are in conflict