"""
Type definitions for type checking purposes.
"""

from typing import (
    Dict, Optional, Union, Callable, Any, List, Tuple, Pattern, Generator, Iterable, Type, TYPE_CHECKING
)

try:
    from typing import Protocol
except ImportError:
    # Added in Python 3.8
    Protocol = object

try:
    from typing import SupportsIndex
except ImportError:
    # 'SupportsIndex' got added in Python 3.8
    SupportsIndex = None

if TYPE_CHECKING:
    # typing.Self requires Python 3.11
    from typing_extensions import Self
else:
    Self = object