slots — Easy Playground

Restricts instance attributes to a fixed set for memory savings

Python Playground

# __slots__ restricts attribute creation for memory efficiency
class Point:
    __slots__ = ("x", "y")

    def __init__(self, x, y):
        self.x = x
        self.y = y

p = Point(1, 2)
print(p.x, p.y)

try:
    p.z = 3
except AttributeError as e:
    print(f"Cannot add: {e}")

Output

Click "Run" to execute your code

__slots__ is a special attribute that restricts instance attributes to a fixed set for memory savings.

Challenge

Try modifying the code above to explore different behaviors. Can you extend the example to handle a new use case?

View all Easy examples for __slots__

__slots__ — Easy Playground

Challenge

slots — Easy Playground