__mul__ — Easy Examples

Defines behavior for the * multiplication operator

EasyIntermediateAdvancedExpert

Implementing __mul__

Basic implementation of __mul__ in a class.

python
class Example:
    def __mul__(self):
        return "Example __mul__"

obj = Example()
print(obj)

__mul__ defines behavior for the * multiplication operator. Implementing it lets you customize how Python interacts with your objects.

__mul__ in action

Seeing __mul__ called by Python's built-in operations.

python
# How Python calls __mul__ automatically
class Demo:
    def __init__(self, value):
        self.value = value

    def __mul__(self, other):
        print(f"__mul__ was called!")
        return self

d = Demo(42)
# This triggers __mul__:
result = d * Demo(2)

Python automatically calls __mul__ when you use the corresponding operator or function on your object.

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