WORKING WITH LISTS

Python supports a list data type, along with a rich set of list-related functions. Since lists are not typed, you can create a list of different data types, as well as multidimensional lists. The next several sections show you how to manipulate list structures.

Lists and Basic Operations

A list consists of comma-separated values enclosed in a pair of square brackets. The following examples illustrate the syntax for defining a list, and also how to perform various operations on a list:

>>> list = [1, 2, 3, 4, 5]

>>> list

[1, 2, 3, 4, 5]

>>> list[2]

3

>>> list2 = list + [1, 2, 3, 4, 5]

>>> list2

[1, 2, 3, 4, 5, 1, 2, 3, 4, 5]

>>> list2.append(6)

>>> list2

[1, 2, 3, 4, 5, 1, 2, 3, 4, 5, 6]

>>> len(list)

5

>>> x = ['a', 'b', 'c']

>>> y = [1, 2, 3]

>>> z = [x, y]

>>> z[0]

['a', 'b', 'c']

>>> len...