Python: Remove items from Python set

Last update on December 21 2024 07:45:47 (UTC/GMT +8 hours)

Write a Python program to remove item(s) from a given set.

Visual Presentation:

Sample Solution-1:

Python Code:

Remove single element from a given set:

# Create a set 'num_set' with the elements 0, 1, 3, 4, and 5 using a list:
num_set = set([0, 1, 3, 4, 5])

# Print a message to indicate the original set:
print("Original set:")

# Print the contents of the 'num_set':
print(num_set)

# Remove and return the first element from 'num_set' using the 'pop' method:
num_set.pop()

# Print a message to indicate the set after removing the first element:
print("\nAfter removing the first element from the said set:")

# Print the updated 'num_set' without the first element:
print(num_set) 

Sample Output:

Original set:
{0, 1, 3, 4, 5}

After removing the first element from the said set:
{1, 3, 4, 5}

Sample Solution-2:

Python Code:

Remove all elements from a given set:

# Define a function 'remove_all_elements' that takes a set 'num_set' as an argument:
def remove_all_elements(num_set):
    # Use a 'while' loop to remove elements from 'num_set' as long as it is not empty:
    while num_set:
        num_set.pop()
    # Return the empty 'num_set' after removing all elements:
    return num_set

# Create a set 'num_set' with the elements 0, 1, 3, 4, and 5 using a list:
num_set = set([0, 1, 3, 4, 5])

# Print a message to indicate the original set:
print("Original set:")

# Print the contents of the 'num_set':
print(num_set)

# Print a message to indicate the set after removing all elements:
print("\nAfter removing all elements from the said set:")

# Call the 'remove_all_elements' function to remove all elements from 'num_set' and print the resulting set (should be empty):
print(remove_all_elements(num_set)) 

Sample Output:

Original set:
{0, 1, 3, 4, 5}

After removing all elements from the said set:
set() 

Flowchart:

Python Code Editor:

Previous: Write a Python program to add member(s) in a set.
Next: Write a Python program to remove an item from a set if it is present in the set.