from collections.abc import Generator
from typing import Any

def is_valid(x) -> bool: ...
def rescale(y, W, H, mi, ma) -> list[Any]: ...
def linspace(start, stop, num) -> list[Any]: ...
def textplot_str(expr, a, b, W=..., H=...) -> Generator[str, Any, None]: ...
def textplot(expr, a, b, W=..., H=...) -> None: ...