What is not working with my "map" usage?

[Peter Otten]

Victor via Python-list wrote:

> Let me use a different input args and display them below.  Basically, I am
> hoping to add up all elements of each nested list.  So at first it should
> start with [1,11,111] ==> 1+11+111 = 123.  But instead, it appears to take
> the 1st element from each nested list to add up [1,2,3] = 6.   How should
> it be corrected?  Thx.

I see three options. You can

(1) use a list comprehension

[add_all_elements(*sub) for sub in alist]

(2) replace map() with itertools.starmap()

list(itertools.starmap(add_all_elements, alist))

(3) change your function's signature from add_all_elements(*args) to 
add_all_elements(args), either by modifying it directly or by wrapping it 
into another function

list(map(lambda args: add_all_elements(*args), alist))

(3a) My personal preference would be to change the signature and then use 
the list comprehension

def add_all_elements(args): ...
[add_all_elements(sub) for sub in alist]