‪‪‪‪‪‪‫‪‪‪‪‪‫‪‪‪‪‪‫‪‪‪‪‪‫‪‪‪‪‪‪‫‪a=[9,6,4,5]N=len(a)foriinrange(int(len(a)/2)):a[i],a[N-i-1]=a[N-i-1],a[i]print(a)上面代码的输出结果是[5,4,6,9]