複数のリストに対する追加

Question

my_list=[["A","B","C","D","E","F","G","H"],["I","J","K","L","M","N","O","P"]]
my_list.append("QQ")
print(my_list)

上記のプログラムがあります。
Hの後ろとPの後ろにQQが入るようにしたいです。(下記のような感じで)
[["A","B","C","D","E","F","G","H","QQ"],["I","J","K","L","M","N","O","P","QQ"]]

プログラムの２行目をどのような記載にすればいいでしょうか？
ご教示をお願いします。

Answer 1

for x in my_list:
    x.append("QQ")

Answer 2

p.py

my_list = [
    ["A", "B", "C", "D", "E", "F", "G", "H"],
    ["I", "J", "K", "L", "M", "N", "O", "P"]
]
my_list = [x + ["QQ"] for x in my_list]
print(my_list)

実行例