__new__ — Easy Examples

Creates and returns a new instance before __init__ is called

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Implementing __new__

Basic implementation of __new__ in a class.

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

obj = Example()
print(obj)

__new__ creates and returns a new instance before __init__ is called. Implementing it lets you customize how Python interacts with your objects.

__new__ in action

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

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

    def __new__(self):
        print(f"__new__ was called!")
        return self

d = Demo(42)
# This triggers __new__:
print(d)

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

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