Ошибка TypeError: object of type 'int' has no len()

Question

Почему код:

test = ['sum_for_pivot', '=', 1111]
filter_1 = [t for t in test if len(t) == 3]
print(filter_1)

выводит ошибку:

TypeError: object of type 'int' has no len()

Answer 1

Вопрос закрыт:

test = [['sum_for_pivot', '=', 1111]]
filter_1 = [t for t in test if len(t) == 3]
print(filter_1)