Python - Sets

In Python, a set is an unordered collection of unique elements. Sets are commonly used for membership testing, removing duplicates from other collections, and performing mathematical set operations. Here's an example program illustrating the use of sets:

# Creating a set
my_set = {1, 2, 3, 4, 5}

# Displaying the set
print("Set:", my_set)

# Adding elements to the set
my_set.add(6)
my_set.update({7, 8})

# Displaying the modified set
print("Modified Set:", my_set)

# Removing elements from the set
my_set.remove(3)

# Displaying the final set
print("Final Set:", my_set)

Output:

Set: {1, 2, 3, 4, 5}
Modified Set: {1, 2, 3, 4, 5, 6, 7, 8}
Final Set: {1, 2, 4, 5, 6, 7, 8}

In this example, a set named my_set is created with elements 1 to 5. Elements are added using add() and update() methods, and an element is removed using the remove() method. The resulting set contains unique elements and is unordered.

In Python, an empty set can be created using the set() constructor. Here's an example program demonstrating how to create an empty set:

# Creating an empty set
empty_set = set()

# Displaying the empty set
print("Empty Set:", empty_set)

Output:

Empty Set: set()

In this example, the set() constructor is used to create an empty set named empty_set. The resulting set is then displayed, showing that it is indeed an empty set.

Sets in Python are unordered collections of unique elements. Here are key characteristics of sets along with an example program:

# Creating a set with unique elements
my_set = {1, 2, 3, 4, 5, 1, 2}

# Displaying the set
print("Set:", my_set)

# Adding an element to the set
my_set.add(6)

# Displaying the updated set
print("Updated Set:", my_set)

# Removing an element from the set
my_set.remove(3)

# Displaying the set after removal
print("Set after removal:", my_set)

Output:

Set: {1, 2, 3, 4, 5}
Updated Set: {1, 2, 3, 4, 5, 6}
Set after removal: {1, 2, 4, 5, 6}

Key characteristics:

1. Sets do not allow duplicate elements.
2. Sets are unordered, so the elements have no specific order.
3. Elements can be added to a set using the add() method.
4. Elements can be removed from a set using the remove() method.

You can initialize a set with values in Python using curly braces. Here's an example program:

# Initializing a set with values
my_set = {1, 2, 3, 4, 5}

# Displaying the set
print("Initialized Set:", my_set)

Output:

Initialized Set: {1, 2, 3, 4, 5}

In this example, we've created a set my_set with the values 1, 2, 3, 4, and 5. Sets automatically eliminate duplicate values, so even if you include duplicates in the initialization, they will be removed.