Which of the following is not a valid Python data type?

In Python, data types are the classifications that determine the kind of value a variable can hold and what operations can be performed on it. The first three options – list, set, and dictionary – are all built-in data types in Python.

A list is an ordered collection of elements that can be of different types, allowing for dynamic resizing. It is defined using square brackets, for example, my_list = [1, 2, 3].

A set is an unordered collection of unique elements. It is defined using curly braces or the set() function, such as my_set = {1, 2, 3}. Sets are useful when the uniqueness of elements is desired.

A dictionary is a collection of key-value pairs, where each key is unique. Dictionaries are defined using curly braces containing key-value pairs separated by colons, like my_dict = {'key1': 'value1', 'key2': 'value2'}. This data type is ideal for associative arrays or when you want to create a lookup table.

On the other hand, the term "pointer" does not denote a data type in Python. While pointers exist in programming languages like C or C++, where they directly reference memory addresses