better way to convert list element into a list like this one

Question

i think this should be very easy , but i really don't know how to write it in a better way, if you know please tell me

#there are some points in text files and was read into a list
s = ['3,4','4,5','6,5','7,8']
#break s element to (x,y) form every element should convert to number type
points = [] 
for pStr in s:
    ss = pStr.split(',')
    points.append([int(p) for p in ss])
print(points) #[[3, 4], [4, 5], [6, 5], [7, 8]]

better write it in one line please

Answer 1

using a list comprehension:

In [19]: s = ['3,4','4,5','6,5','7,8']

In [21]: [[int(y) for y in x.split(',')] for x in s]
Out[21]: [[3, 4], [4, 5], [6, 5], [7, 8]]