Split value of string within array of arrays in Python

Question

I've an arrays of arrays called arr and I want to split the second value of each array. This means, if I've 0-6 I would like to modify it to '0','6'

What I have:

arr = [['PROVEEDOR', '0-6', '11111'], ['tiempo ida pulidor', '6-14', '33333']]

What I would like to have:

arr = [['PROVEEDOR', '0', '6', '11111'], ['tiempo ida pulidor', '6', '14', '33333']]

How can I do this conversion? It's always the second value, and always have two numbers. I know I've to use .split('-') but I know dont know to make it work here to make the replacement, as I've to iterate between all the arrays included in arr.

Thanks in advance.

Answer 1

If you want to do it inplace:

In [83]: arr = [['PROVEEDOR', '0-6', '11111'], ['tiempo ida pulidor', '6-14', '33333']]

In [84]: for i in arr:
    ...:     i[1:2]=i[1].split('-')

In [85]: arr
Out[85]: [['PROVEEDOR', '0', '6', '11111'], ['tiempo ida pulidor', '6', '14', '33333']]