from typing import (
    Any,
    Self,
)

import numpy as np
from numpy import typing as npt

class NAType:
    def __new__(cls, *args: Any, **kwargs: Any) -> Self: ...

NA: NAType

def is_matching_na(
    left: object, right: object, nan_matches_none: bool = ...
) -> bool: ...
def isposinf_scalar(val: object) -> bool: ...
def isneginf_scalar(val: object) -> bool: ...
def checknull(val: object) -> bool: ...
def isnaobj(arr: np.ndarray) -> npt.NDArray[np.bool_]: ...
def isna_string(arr: np.ndarray) -> npt.NDArray[np.bool_]: ...
def is_numeric_na(values: np.ndarray) -> npt.NDArray[np.bool_]: ...
def is_pdna_or_none(values: np.ndarray) -> npt.NDArray[np.bool_]: ...