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 +?
In Python, the special method you use for the bitwise NOT operator (i.e., "~") is `__invert__()`. However, note that this method is not commonly used and not many classes implement it. Instead, Python uses the `operator.invert()` function to perform the bitwise NOT operation on an integer. Here's an example:
1 2 3 4 5 6 7 8 9 10 | class MyInt: def __init__(self, value): self.value = value def __invert__(self): return MyInt(~self.value) x = MyInt(10) y = ~x print(y.value) # Output: -11 |
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 +?
In Python, the special method you use for the bitwise NOT operator `~` is `__invert__()`. However, it's important to note that this method is not commonly used, and Python does not mandate the use of this method for the `~` operator. In fact, the `~` operator is usually implemented directly in the object's underlying C code, rather than through a Python method. That being said, if you want to define a custom class that supports the `~` operator, you can do so by defining the `__invert__()` method in your class. Here's an example:
1 2 3 4 5 6 7 8 9 10 | class MyInt: def __init__(self, value): self.value = value def __invert__(self): return MyInt(~self.value) x = MyInt(10) y = ~x print(y.value) # Output: -11 |
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 +?
In Python, the special method that corresponds to the `~` (bitwise NOT) operator is `__invert__`. However, this method is not commonly used, as the `~` operator is usually implemented directly on the underlying numeric type. If you want to define a custom class that supports the `~` operator, you can define the `__invert__` method as follows:
1 2 3 4 5 6 | class MyClass: def __init__(self, value): self.value = value def __invert__(self): return MyClass(~self.value) |
1 2 3 | x = MyClass(0b1011) y = ~x print(y.value) # prints: -11 |
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 +?
In Python, you can use the `__rtruediv__` or `__truediv__` method for the division operator `/`, and the `__rmod__` or `__mod__` method for the modulus operator `~` (which is actually a bitwise operator in Python). Here's an example of how to define a custom class with these methods:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 | class MyNumber: def __init__(self, value): self.value = value def __truediv__(self, other): return MyNumber(self.value / other.value) def __rtruediv__(self, other): return MyNumber(other / self.value) def __mod__(self, other): return MyNumber(self.value % other.value) def __rmod__(self, other): return MyNumber(other % self.value) # Example usage: a = MyNumber(10) b = MyNumber(3) c = a / b # This calls __truediv__ d = b / a # This calls __rtruediv__ e = a % b # This calls __mod__ f = b % a # This calls __rmod__ print(c.value) # Output: 3.3333333333333335 print(d.value) # Output: 0.3 print(e.value) # Output: 1 print(f.value) # Output: 2 |
1 2 3 4 5 6 7 8 9 10 11 12 | class MyNumber: def __init__(self, value): self.value = value def __invert__(self): return MyNumber(~self.value) # Example usage: a = MyNumber(10) b = ~a print(b.value) # Output: -11 |
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 +?
In Python, the `__rtruediv__` (read as "reverse true division") magic method is used for the `~` (bitwise NOT) operator. However, it's not commonly used or overridden in custom classes. The `__rtruediv__` method is actually used for the right-side division operator `/`, but since the `~` operator doesn't have a corresponding method, I mentioned it as there's no direct answer to your question. If you want to implement a custom operation for the `~` operator, you would typically define the `__invert__` method. However, it's important to note that `__invert__` is not automatically called by the `~` operator, unlike other magic methods and their respective operators. You would need to call the `__invert__` method explicitly when working with the `~` operator. Here's an example:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 | class CustomInt: def __init__(self, value): self.value = value def __invert__(self): return CustomInt(~self.value) def __repr__(self): return f"CustomInt({self.value})" x = CustomInt(5) y = ~x print(y) # This won't work as expected, since ~ doesn't call __invert__ # Instead, you need to do this: y = x.__invert__() print(y) # Output: CustomInt(-6) |
Testing if the previous output contains the string __invert__
: True
Testing if the previous output contains the string __inv__
: False