Takes arguments of any basic data type, returning sum of all ints

Recursive int adder (py)

#!/usr/bin/env python


def add_ints(*args):
    return_sum = 0
    for i in args:
        if type(i) in [list, tuple]:
            for list_key in i:
                    return_sum += add_ints(list_key)
        if type(i) == dict:
            for dict_key in i:
                return_sum += add_ints(i[dict_key])
        try:
            i = int(i)
        except:
            continue
        else:
            return_sum += i

    return return_sum


def main():
    # tests
    my_var = add_ints((['1', '2', '3', '36'],))
    my_var += add_ints({'one': 1, 2: 'two', 'testlist': [-1, 100]})
    my_var += add_ints(-100)
    print(my_var)

if __name__ == '__main__':
    main()