Summing elements in a list Summing elements in a list python python

Summing elements in a list


You can sum numbers in a list simply with the sum() built-in:

sum(your_list)

It will sum as many number items as you have. Example:

my_list = range(10, 17)my_list[10, 11, 12, 13, 14, 15, 16]sum(my_list)91

For your specific case:

For your data convert the numbers into int first and then sum the numbers:

data = ['5', '4', '9']sum(int(i) for i in data)18

This will work for undefined number of elements in your list (as long as they are "numbers")

Thanks for @senderle's comment re conversion in case the data is in string format.


>>> l = raw_input()1 2 3 4 5 6 7 8 9 10>>> l = l.split()>>> l.pop(0)'1'>>> sum(map(int, l)) #or simply sum(int(x) for x in l) , you've to convert the elements to integer first, before applying sum()54


Python iterable can be summed like so - [sum(range(10)[1:])] . This sums all elements from the list except the first element.

>>> atuple = (1,2,3,4,5)>>> sum(atuple)15>>> alist = [1,2,3,4,5]>>> sum(alist)15