Summary  
This chapter covers how to use the clear() method to remove all elements from a set.  

General domain of usage  
Managing collections of items

Just like in other data structures, the `clear()` method completely wipes out all the elements.

Let's say you have a set of favorite movies, but you decide to start fresh and clear the collection:

# Define a set of favorite movies
movies = {"Inception", "Interstellar", "Tenet"}
print("Original set:", movies)

# Clear the set
movies.clear()
print("After clearing:", movies)

import unittest

def _dynamic_test(test_case, condition, success_message, failure_message):
    if condition:
        test_case._testMethodName = success_message
        test_case.assertTrue(True, success_message)
    else:
        test_case._testMethodName = failure_message
        test_case.fail(failure_message)

class TestUserCode(unittest.TestCase):

    def test_worst_movies_is_declared(self):
        import user_code
        _dynamic_test(
            self,
            hasattr(user_code, 'worst_movies'),
            "The `worst_movies` set is declared.",
            "Expected `worst_movies` to be declared."
        )

    def test_worst_movies_is_set(self):
        import user_code
        _dynamic_test(
            self,
            isinstance(user_code.worst_movies, set),
            "The `worst_movies` is of type `set`.",
            "Expected `worst_movies` to be of type `set`."
        )

    def test_worst_movies_is_empty(self):
        import user_code
        _dynamic_test(
            self,
            len(user_code.worst_movies) == 0,
            "The `worst_movies` set is cleared.",
            f"Expected `worst_movies` to be empty, but got {user_code.worst_movies}."
        )

    def test_clear_method_used(self):
        """
        Test to ensure `clear()` method is used in the solution.
        """
        with open('user_code.py', 'r') as file:
            user_code_source = file.read()
        _dynamic_test(
            self,
            "clear" in user_code_source,
            "The `clear()` method is used to clear the set.",
            "Expected the `clear()` method to be used to clear the set."
        )

if __name__ == '__main__':
    unittest.main()


test_main.py

Explore the fundamental data structures of the Python programming language, including lists, dictionaries, tuples, and sets, and learn how to apply them effectively to solve real-world programming challenges.

What is a list? A list is an ordered collection that can be modified. It also allows for duplicate elements.

What is a dictionary? A dictionary is an ordered collection that can be changed, but it doesn't allow duplicate entries. It consists of key:value pairs, which are used to optimize its structure.

What is a tuple? A tuple is an ordered collection that cannot be altered. It can have duplicate elements. While it's similar to a list, the values in a tuple can be of any type and are indexed by integers. Although not mandatory, it's common to enclose the values of a tuple in parentheses, making them easier to understand in Python.

What is a set? In Python, a set is an unordered collection that is both iterable and mutable, with no repeated elements. While the order of items in a set isn't fixed, it can include a variety of elements. A key benefit of using sets over lists is their highly efficient method for determining if an element exists within the set.

Using the clear() Method: Removing All Elements from a Set

Solution

Awesome!

Using the clear() Method: Removing All Elements from a Set

Solution