❓ Как понять хешируемый ли объект?1️⃣ Объект должен иметь метод `__hash__()`

Библиотека собеса по Python | вопросы с собеседований

❓ Как понять хешируемый ли объект?

1️⃣ Объект должен иметь метод `__hash__()`, который возвращает целое число — это и есть хеш объекта.

2️⃣ Хеш-значение не должно меняться в течение жизни объекта. Это важно, чтобы объект можно было использовать как ключ в словарях или элемент в множествах.

3️⃣Объект должен поддерживать сравнение через `__eq__()`. Если два объекта равны (по ==), они обязаны иметь одинаковый хеш.

Простое правило:

— Неизменяемые объекты в Python (например,

int

float

str

tuple

frozenset

) — хешируемы.
— Изменяемые объекты (например,

list

dict

set

) — не хешируемы.

Библиотека собеса по Python

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Create: 2025-04-09
Last Update: 2025-06-18 17:02:04

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