Python checkio median解决方案

def function1(numberlist):    import numpy    return numpy.median(numberlist)def function2(numberlist):    import statistics as stats    return stats.median(numberlist)def function3(numberlist):    numberlist = sorted(numberlist)    return  (numberlist[(len(numberlist)-1)//2] + numberlist[(len(numberlist)+1)//2])/2 if len(numberlist) %2 == 0  else  numberlist[(len(numberlist)-1)//2]