codewars/courses/python_func/default_args.py

from functools import reduce


def append_to_list_1(value, my_list = []):
    my_list.append(value)
    print(my_list, id(my_list))
    return my_list


def test_1():
    lst = append_to_list_1(10)
    lst = append_to_list_1(25)
    lst = append_to_list_1(37)

    print('Итог', lst, id(lst))


def append_to_list_2(value, my_list=None):
    if my_list is None:
        my_list = []
    my_list.append(value)
    print(my_list, id(my_list))
    return my_list


def test_2():
    result1 = append_to_list_2(10)
    result1 = append_to_list_2(15, result1)
    result2 = append_to_list_2(25)
    result2 = append_to_list_2(37, result2)
    

# Словарь
def append_to_dict(key, value, my_dict=None):
    if my_dict is None:
        my_dict = {}
    my_dict[key] = value
    return my_dict


def replace(text, old, new=''):
    ret = ''
    for i in range(len(text)):
        if text[i] == old:
            ret += new
        else:
            ret += text[i]
    return ret


def product(lst: list, start=1):
    return reduce(lambda a, b: a*b, lst, start)



def main():
    # test_1()
    # test_2()
    # print(replace('nobody; i myself farewell analysis', 'l', 'z'))
    print(product([1, 2, 3], start=10))

if __name__ == '__main__':
    main()