WebNone of this happens when I use regular classes. I understand the dataclass is supposed to be treated like a Value Objet, but the inconsistent behaviour between platforms is what … WebSep 3, 2024 · The @dataclass decorator has several parameters you can leverage ... __hash__ will be set to None, marking it unhashable (which it is). ... Imagine that you want to initialize a field of type List.

Using mutable dataclass best practice CodeReview.doctor

Web165. The problem is that you can't use a list as the key in a dict, since dict keys need to be immutable. Use a tuple instead. Note that in most cases, the ( and ) are optional, since , is what actually defines a tuple (as long as it's not surrounded by [] or {}, or used as a function argument). You might find the section on tuples in the ... WebFrozen dataclass will also generate a __hash__() method on the class. This allows the instance to be used in set and dict objects. Attempting to add a non-hashable object to a dict will result in TypeError: unhashable type. An immutable object is an object that cannot be modified. Strings are an example of an immutable object. dyna-glo propane garage heater

Using mutable dataclass best practice CodeReview.doctor

WebJan 23, 2014 · I have a "solution" for this, but I want to make sure its a viable solution and not an unstable hack. I realize that adding the ne and eq functions to the class requires the hash function to be added in order for the model to be hashable. So this is now working: WebNov 4, 2024 · Aren't the docs quite clear about this? By default, dataclass() will not implicitly add a __hash__() method unless it is safe to do so. Here are the rules governing implicit … WebFeb 1, 2024 · Per Python spec: "the implementation of hashable collections requires that a key’s hash. value is immutable (if the object’s hash value changes, it will be in. the wrong … dyna glo pro garage heater