A list? is another type of data. Unlike a tuple, which uses parentheses, lists use square brackets, [ and ], as shown in the following code. A list could include different types of data, such as string, integer, float, and A list itself:

>>>record=['John',21,'Engineer',3]
>>>record
['John', 21, 'Engineer', 3]

Like tuples, the first data item starts with a subscript of zero. If we want to list all the data items from subscript 1 to the end of the list, we use record[1:], and to list all the data items from subscript 2 to the end of the list, we use record[2:], as shown in the following code:

>>>len(record)
4
>>>record[0]
'John'
>>>record[2:]
['Engineer', 3]

Unlike tuples, which are immutable, lists can be modified.

record[0]='Mary'
>>>record[0]
'Mary'