I am stuck with scenario , where i want to add values of list
For example :
my_list=[2,4,5,8]
My Output :
[2,6,11,19]
It should add like 2 , next value 4+2 : 6 , 6+5 : 11 , 8+11 : 19
How to read previous values ? and add with next value
4 Answers
This is the exact process that itertools.accumulate() does.
Make an iterator that returns accumulated sums
from itertools import accumulate
my_list = [2,4,5,8]
my_list_accumulated = list(accumulate(my_list))
print(my_list_accumulated)
Output:
[2, 6, 11, 19]
answered Sep 12, 2021 at 14:24
Niel Godfrey P. Ponciano
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1 Comment
mozway
I love numpy, but this should be the accepted answer ;) +1
You can use numpy.cumsum() like below:
a=[2,4,5,8]
np.cumsum(a)
# array([ 2, 6, 11, 19])
np.cumsum(a).tolist()
# [ 2, 6, 11, 19]
Comments
You can do something like this:
my_list=[2,4,5,8]
new_list = []
if(len(my_list)>0):
new_list = my_list[0]
for i in range(1,len(my_list)):
new_list.append(my_list[i-1]+my_list[i])
new_list will contain the result
Comments
I hope its readable and usefull
my_list = [2, 4, 5, 8]
for index in range(len(my_list)-1):
if index != 0:
my_list[index] += my_list[index - 1]
[2, 6, 11, 19]
1 Comment
Community
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