Sum of column values in a string matrix using numpy in python

Question

l=["101","111","011"] calculate sum of column values using numpy of string matrix for i in range(k): sum=0 for j in range(n): sum+=int(s[j][i])

Answer 1

The simplest would be:

>>> sum([int(x) for x in l])
223

If you want to use numpy:

a = np.array(l).astype(int)
>>> a
array([101, 111,  11])

>>> a.sum()
223

Answer 2

Assuming you want to sum per column/position

l=["101","111","011"]
[sum(map(int, x)) for x in zip(*l)]
#[2, 2, 3]

Not that this is different from a classical sum([int(x) for x in l]) if you reach a sum greater than 9:

l=["101","191","011"]

[sum(map(int, x)) for x in zip(*l)]
# [2, 10, 3]

sum([int(x) for x in l])
# 303