from collections.abc import Generator, Iterator
from typing import Any

from sympy.core.basic import Basic
from sympy.core.cache import cacheit
from sympy.core.expr import Expr

class SeriesBase(Expr):
    @property
    def interval(self): ...
    @property
    def start(self): ...
    @property
    def stop(self): ...
    @property
    def length(self): ...
    @property
    def variables(self) -> tuple[()]: ...
    @property
    def free_symbols(self) -> set[Basic]: ...
    @cacheit
    def term(self, pt): ...
    def __iter__(self) -> Iterator[Any]: ...
    def __getitem__(self, index) -> list[Any] | None: ...