def cumulative_sum(my_list):
   cumulative_list = []
   my_length = len(my_list)
   cumulative_list = [sum(my_list[0:x:1]) for x in range(0, my_length+1)]
   return cumulative_list[1:]

my_list = [10, 20, 25, 30, 40, 50]
print("该列表是:")
print(my_list)
print("该累加总和为:")
print (cumulative_sum(my_list))

该列表是:
[10, 20, 25, 30, 40, 50]
该累加总和为:
[10, 30, 55, 85, 125, 175]