This tutorial shows multiple examples of Python programs to add two lists, and if the list data type is a number, then sum up the value, and if a string then concatenate.

## Example 1:

import operator from functools import reduce def concat_or_sum(*lists): return [reduce(operator.add, x) for x in zip(*lists)] sum_list = concat_or_sum([2, 4, 't'], [5, 7, 't'], [10, 11, 't']) print(sum_list) sum_list = concat_or_sum([1, 'a', 'c'], [2, 'b', 'd'], [3, 'e', 'f']) print(sum_list)

### Output:

[17, 22, 'ttt'] [6, 'abe', 'cdf']

## Example 2:

from operator import add x = [2, 4, 'a'] y = [5, 7, 'b'] sum_list = list(map(add, x, y)) print(sum_list)

### Output:

[7, 11, 'ab']

## Example 3:

import operator from functools import reduce list1 = [2, 4, 'a'] list2 = [5, 7, 'b'] sum_list = [reduce(operator.add, x) for x in zip(list1, list2)] print(sum_list)

### Output:

[7, 11, 'ab']