Usage and examples of Python set discard()

Méthodes de collection en Python

Python set discard() is used to remove the specified element from the set (if it exists).

The syntax of discard() in Python is:

s.discard(x)

discard() parameters

discard() method takes a single element x and removes it from the set (if it exists).

discard() return value

If the x element exists, discard() removes it from the set.

This method returns None (which means, no return value).

Example1How does discard() work?

numbers = {2,　3,　4,　5}
numbers.discard(3)
print('numbers =', numbers)
numbers.discard(10)
print('numbers =', numbers)

When running this program, the output is:

numbers = {2,　4,　5}
numbers = {2,　4,　5}

Example2How does discard() work?

numbers = {2,　3,　5,　4}
# Returns None
# This means, no return value
print(numbers.discard(3))
print('numbers =', numbers)

When running this program, the output is:

None
numbers = {2,　4,　5}

Méthodes de collection en Python