import inspect from functools import wraps from typing import Any, Callable, Mapping, Sequence, Set, TypeVar, Union, cast from pydantic import BaseModel F = TypeVar("F", bound=Callable) class FrozenDict(dict): def __hash__(self) -> int: # type: ignore return hash(frozenset((k, freeze(v)) for k, v in self.items())) class FrozenList(list): def __hash__(self) -> int: # type: ignore return hash(tuple(freeze(i) for i in self)) class FrozenSet(set): def __hash__(self) -> int: # type: ignore return hash(frozenset(freeze(i) for i in self)) def freeze_arguments(func: F) -> F: @wraps(func) def wrapper(*args: Any, **kwargs: Any) -> Any: args = tuple(freeze(arg) for arg in args) kwargs = {k: freeze(v) for k, v in kwargs.items()} return func(*args, **kwargs) @wraps(func) async def async_wrapper(*args: Any, **kwargs: Any) -> Any: return await wrapper(*args, **kwargs) return cast(F, async_wrapper if inspect.iscoroutinefunction(func) else wrapper) def freeze(value: Union[Sequence[Any], Mapping[str, Any], Set[Any], BaseModel]) -> Any: """ >>> class MyClass(BaseModel): ... a: int >>> my_object = MyClass(a=3) >>> my_other_object = MyClass(a=4) >>> freeze(my_object) == freeze(my_other_object), freeze(my_object) == freeze(my_object) (False, True) """ if isinstance(value, dict): return FrozenDict(value) if isinstance(value, list): return FrozenList(value) if isinstance(value, set): return FrozenSet(value) if isinstance(value, BaseModel): class HashableValue(type(value)): # type: ignore def __hash__(self) -> int: return hash(frozenset((k, freeze(v)) for k, v in self.dict().items())) return HashableValue(**value.dict()) return value