[FIXED] Using map to sum the elements of list

Issue

I was wondering if map can be used at all to sum the elements of a list.

assume a = [1, 2, 3, 4]

list(map(sum, a)) will give an error that int object is not iterable because list wants iterables.

map(sum, a) is a valid statement but given the object, I do not see an easy way to dereference it.

[map(sum, a)] will return an object inside the list

this answer states that it should be easy. What am I missing here?

Solution

x = list(map(sum,a)) 

Is equivalent to

x = []
for i in a:
    x.append(sum(i))

Sum needs a iterable to apply sum across. If you see the docs syntax goes this way sum(iterable[, start]). Since int is not an iterable you get that error.

Answered By - Bharath M Shetty