Python 3 - Second Edition

3.4    Lists

Let’s now turn to lists. A list is an ordered collection of elements of any data type. To create a list, the literals of the values it should contain are written in square brackets separated by commas:

>>> [1,2,3][1, 2, 3]>>> ["This", "is", "a", "list"]['This', 'is', 'a', 'list']  

In addition, list elements may be defined in form of expressions:

>>> [-7 / 4, 5 * 3][-1.75, 15]  

The elements of a list do not all have to be of the same type and in particular can be lists themselves, as the following example shows:

>>> ["Python", 1, 2, -7 / 4, [1,2,3]]['Python', 1, 2, -1.75, [1, 2, 3]]  

Similar to strings, lists can be extended by elements with the + operator; + forms the concatenation of two lists.

>>> [1,2,3] + ["Python", "is",