Как проверить если список пуст в Python

#empty list
list_1 = []
#ноль, пустой кортеж, пустой список, пустая строка принимаются как False
if not list_1:
    print('yes! the list is empty.')

Автор, очень плохой совет, не делайте так никогда.

делайте как написал Анатолий Жучков, в коментариях

thanks
but if i wanna to check if list is exists how can i do that?

It works similar. If list not exists, then list is None

if list_1:
    print('yes! the list is not None')

Therefore the following code is right

list_1 = None

if not list_1:
    print('the list is empty or None')

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