Python

clear method in set

Click for All Topics

clear method in set - Python

The clear method is used to remove all elements or items from the set.

It will delete all items and make the set empty.

When we call the clear method on a set it will iterate through the elements of the set and delete the elements one by one until the set is not empty.

The clear method doesn’t take any argument.

This method returns nothing.

When we call the clear method on an empty set it will not give any error.

The time complexity of the clear method is O(n) where n is the number of elements.

Syntax –

set_name.clear()

Example 1- let’s see the example

				
					my_set={9,99,999,9999,99999}
print("my_set before clear:",my_set)
my_set.clear()
print("my_set after clear:",my_set)

# Output -
# my_set before clear: {99999, 99, 999, 9, 9999}
# my_set after clear: set()

In the above example, first we create a set called my_set with elements(9,99,999,9999,99999).

After creating the set print the my_set on the output screen using the print function.

Then we call the clear method on my_set and remove all elements of the set.

Then print the empty set.

Example 2- trying to give an argument to the clear method

				
					s={'This', 'is', 'edSlash'}
print(s)
s.clear('is')

# Output -
# {'This', 'is', 'edSlash'}
# Traceback (most recent call last):
  # File "/home/main.py", line 3, in <module>
    # s.clear('is')
# TypeError: set.clear() takes no arguments (1 given)

In the above example, we can see that we can’t give any argument to the clear method.

Example 3- Let’s see the return value of clear

				
					s={'Sanskrit','Hindi','English','Urdu'}
print(s)
return_value=s.clear()
print(s)
print(return_value)

# Output -
# {'Sanskrit', 'Hindi', 'Urdu', 'English'}
# set()
# None

In the above example, we can see that the return value of the clear method is None.

Example 4- Run clear method on an empty set

				
					my_set=set()
print(my_set)
my_set.clear()
print(my_set)

# Output -
# set()
# set()

Example 5-

				
					my_list=[11,10,11,15,18,12,10]
my_set=set(my_list)
print('set before clear',my_set)
my_set.clear()
print('set after clear:',my_set)

# Output -
# set before clear {10, 11, 12, 15, 18}
# set after clear: set()

Python

clear method in set

clear method in set - Python

Talk to our Industry Experts for Career Counselling

Company

Platform

Resources

Get in touch