# Cache **`class Cache`** Bases: [`ABC`](https://docs.python.org/3.11/library/abc.html#abc.ABC) Methods SummaryMethods Documentation **`abstractmethod delete(key)`** Return type [`None`](https://docs.python.org/3.11/library/constants.html#None) **`abstractmethod exists(key)`** Return type [`bool`](https://docs.python.org/3.11/library/functions.html#bool) **`abstractmethod get(key)`** Return type [`Optional`](https://docs.python.org/3.11/library/typing.html#typing.Optional)[[`Any`](https://docs.python.org/3.11/library/typing.html#typing.Any)] **`abstractmethod get_all()`** Return type [`list`](https://docs.python.org/3.11/library/stdtypes.html#list)[[`tuple`](https://docs.python.org/3.11/library/stdtypes.html#tuple)[[`str`](https://docs.python.org/3.11/library/stdtypes.html#str), [`Any`](https://docs.python.org/3.11/library/typing.html#typing.Any)]] **`abstractmethod set(key, value)`** Return type [`None`](https://docs.python.org/3.11/library/constants.html#None)