how to add a newline after each append in list

I have a list of tuples in rows which I need to append to another list and add a newline after each entry I tried everything I can think of but I cant seem to do it properly
here is the code:

niz = ["""
(5, 6, 4)
(90, 100, 13), (5, 8, 13), (9, 11, 13)
(9, 11, 5), (19, 20, 5), (30, 34, 5)
(9, 11, 4)
(22, 25, 13), (17, 19, 13)
"""]

list = []
    for n in niz:
        list.append(n)   
    list = '\n'.join(list)
    print(list)

This is the closest I get:

(5, 6, 4)
(90, 100, 13), (5, 8, 13), (9, 11, 13)
(9, 11, 5), (19, 20, 5), (30, 34, 5)
(9, 11, 4)
(22, 25, 13), (17, 19, 13)

But I need it to be:

[(5, 6, 4),
 (90, 100, 13), (5, 8, 13), (9, 11, 13),
 (9, 11, 5), (19, 20, 5), (30, 34, 5),
 (9, 11, 4),
 (22, 25, 13), (17, 19, 13)]

>Solution :

Join using ",\n" instead of just "\n"and append the first "[" and last "]" characters

list = []
for n in niz:
    list.append(n)   
list = '[' + ',\n'.join(list) + ']'

print(list)