How to split strings in an array into two new arrays [duplicate]

Question

I would like to be able to make an array like list1 = ['a/b','c/d','e/f'] into list2= ['a','c','e'] and list3 = ['b','d','f'].

Answer 1

I would do it this way:

list1 = ['a/b','c/d','e/f']

list2, list3 = map(list, zip(*(x.split('/') for x in list1)))
print(list2, list3)
# ['a', 'c', 'e'] ['b', 'd', 'f']

---

What you do is to create a generator that yields a tuple consisting of the strings left and right of the / char, respectively. Then use zip() to unfold these into the tuples consisting of the first and second elements, respectively. Finally, map() is used to convert the tuples returned by zip() into lists.

Answer 2

[b[0] for b in [a.split('/') for a in list1]]
['a', 'c', 'e']

[b[1] for b in [a.split('/') for a in list1]]
['b', 'd', 'f']