In [50]: runfile('G:/UBCO/2020-2021/Python/20200920/merge_lists.py', wdir='G:/UBCO/2020-2021/Python/20200920')

[1, 2, 5, 12, 6, 7]

[ 1 2 5 12 6 7]

[[ 1 2 3 4]

[-5 -6 -7 -8]]

[[ 1 -5]

[ 2 -6]

[ 3 -7]

[ 4 -8]]

In [51]: