直接上,冲冲冲
#自定义一个数字列表，求列表中第二大数的下标
# ages = [1, 2, 15, 4, 11, 12, 19, 8, 20, 18]
# max1 = 0
# max2 = 0
# for i in range(len(ages)):
# if ages[i] > ages[max1]:
# max2 = max1
# max1 = i
# elif ages[i] > ages[max2]:
# max2 = i
# print(max2)
#