i m getting TypeError: 'NoneType' object is not subscriptable

Question

key="Mike" arr=[(\'Mike\', \'567-2188\'), None, None, (\'Ankit\', \'293-8625\'), (\'Aditya\', \'852-6551\'), (\'Bob\', \'567-8888\'), (\'Ming\', \'293-6753\'), (\'Ming