Add, delete, intersection, union, difference in Python set

In this tutorial, we'll demonstrate how to perform add, delete, intersection, union, and difference operations on Python sets.

Add

Use the add() method to add an element to a set:

my_set = {1, 2, 3}
my_set.add(4)
print(my_set)  # Output: {1, 2, 3, 4}

Delete

Use the remove() or discard() method to delete an element from a set:

# Using remove()
my_set = {1, 2, 3}
my_set.remove(1)
print(my_set)  # Output: {2, 3}

# Using discard()
my_set = {1, 2, 3}
my_set.discard(1)
print(my_set)  # Output: {2, 3}

Intersection

Use the intersection() method or the & operator to find the intersection of two sets:

set_a = {1, 2, 3}
set_b = {3, 4, 5}

# Using intersection() method
intersection_set = set_a.intersection(set_b)
print(intersection_set)  # Output: {3}

# Using & operator
intersection_set = set_a & set_b
print(intersection_set)  # Output: {3}

Union

Use the union() method or the | operator to find the union of two sets:

set_a = {1, 2, 3}
set_b = {3, 4, 5}

# Using union() method
union_set = set_a.union(set_b)
print(union_set)  # Output: {1, 2, 3, 4, 5}

# Using | operator
union_set = set_a | set_b
print(union_set)  # Output: {1, 2, 3, 4, 5}

Difference

Use the difference() method or the - operator to find the difference of two sets:

set_a = {1, 2, 3}
set_b = {3, 4, 5}

# Using difference() method
difference_set = set_a.difference(set_b)
print(difference_set)  # Output: {1, 2}

# Using - operator
difference_set = set_a - set_b
print(difference_set)  # Output: {1, 2}

How to Add Elements to a Python Set:

Use the add() method to add a single element, and update() to add multiple elements.

# Example
my_set = {1, 2, 3}
my_set.add(4)        # Adds a single element
my_set.update({5, 6})  # Adds multiple elements

Remove Element from Set in Python:
- Use the remove() method to remove a specific element. If the element is not present, it raises a KeyError. Use discard() to avoid the error.
```
# Example
my_set = {1, 2, 3, 4}
my_set.remove(2)     # Removes element 2
my_set.discard(5)    # Removes element 5 if present
```

Union of Sets in Python:

Use the union() method or the | operator for the union of two sets.

# Example
set1 = {1, 2, 3}
set2 = {3, 4, 5}
union_set = set1.union(set2)  # or use set1 | set2

Set Difference Operation in Python:

Use the difference() method or the - operator for the set difference.

# Example
set1 = {1, 2, 3}
set2 = {3, 4, 5}
difference_set = set1.difference(set2)  # or use set1 - set2

Deleting Elements from a Set in Python:

Use the remove() or discard() method to delete specific elements.

# Example
my_set = {1, 2, 3, 4}
my_set.remove(2)     # Removes element 2
my_set.discard(5)    # Removes element 5 if present

Adding Multiple Elements to a Set in Python:
- Use the update() method or the | operator to add multiple elements.
```
# Example
my_set = {1, 2, 3}
my_set.update({4, 5, 6})  # or use my_set |= {4, 5, 6}
```
Set Intersection Using '&' Operator in Python:
- Use the intersection() method or the & operator for the set intersection.
```
# Example
set1 = {1, 2, 3}
set2 = {3, 4, 5}
intersection_set = set1.intersection(set2)  # or use set1 & set2
```

Set Union Using '|' Operator in Python:

Use the union() method or the | operator for the set union.

# Example
set1 = {1, 2, 3}
set2 = {3, 4, 5}
union_set = set1.union(set2)  # or use set1 | set2

Symmetric Difference of Sets in Python:

Use the symmetric_difference() method or the ^ operator for the symmetric difference.

# Example
set1 = {1, 2, 3}
set2 = {3, 4, 5}
symmetric_difference_set = set1.symmetric_difference(set2)  # or use set1 ^ set2