Dictionaries also have a `popitem()` method that removes and returns the last key-value pair. 

# Creating Dictionary
numbers= {1: 'one', 2: 'two', 3: 'three', 5: 'five'}
 
# Deleting a key using popitem()
popped_element = numbers.popitem()
print(numbers)

In this course, you'll get to know the fundamental data structures of the Python programming language. We'll explore how to utilize Python's native data structures like lists, dictionaries, tuples, and sets to tackle different 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.

Python Data Structures

Popitem() Method

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Python Data Structures

Popitem() Method

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