code: def best_observer(population, num_generations, num_evaluations, args):
      
      print("Best Individual: {0}\n".format(str(max(population))))
docs: Print the best individual in the population to the screen.
      
      This function displays the best individual in the population to 
      the screen. 
      
      .. Arguments:
         population -- the population of Individuals
         num_generations -- the number of elapsed generations
         num_evaluations -- the number of candidate solution evaluations
         args -- a dictionary of keyword arguments