In python what __thing__ do I use for ~, kind of like how __add__ is for +?
In python what __thing__ do I use for ~, kind of like how __add__ is for +?
The magic method you're looking for is __invert__. When you use the ~ operator on an object, Python checks if the object's class has an __invert__ method defined. If it does, Python will call that method to perform the operation. For example, if you define a class like this: class MyNumber: def __init__(self, value): self.value = value def __invert__(self): return f"Inverted: {~self.value}" num = MyNumber(10) print(~num) When you execute the code above, Python will call the __invert__ method you defined for MyNumber, allowing you to customize the behavior of the ~ operator.
Testing if the previous output contains the string __invert__: True
Testing if the previous output contains the string __inv__: False
In python what __thing__ do I use for ~, kind of like how __add__ is for +?
In python what __thing__ do I use for ~, kind of like how __add__ is for +?
The special method you use for the ~ operator is __invert__. Just like you would implement __add__(self, other) for the + operator, you can define __invert__(self) to customize the behavior of the ~ operator for your class. Here’s a quick example: class MyNumber: def __init__(self, value): self.value = value def __invert__(self): # For demonstration, simply return the bitwise inversion of self.value. return ~self.value num = MyNumber(5) print(~num) # This calls MyNumber.__invert__(num) internally. In this example, when you use ~ on an instance of MyNumber, Python calls the __invert__ method you've defined.
Testing if the previous output contains the string __invert__: True
Testing if the previous output contains the string __inv__: False