Say I have a two lists:

l1 = ['a','b','c']
l2 = ['d','e','f']

How do I merge the elements with other list elements?

output: ['a_d', 'b_e', 'c_f']

l1 = ['a','b','c']
l2 = ['d','e','f']print([f'{x}_{y}' for x, y in zip(l1, l2)])['a_d', 'b_e', 'c_f']