From 29ba43af01d74b36a98e8defbc4c764ff8c66ce3 Mon Sep 17 00:00:00 2001
From: Will McGugan <willmcgugan@gmail.com>
Date: Mon, 6 Feb 2023 17:49:12 +0000
Subject: [PATCH] typealias import

---
 src/textual/__init__.py    | 6 +++++-
 src/textual/_border.py     | 6 ++++--
 src/textual/_compositor.py | 2 +-
 3 files changed, 10 insertions(+), 4 deletions(-)

diff --git a/src/textual/__init__.py b/src/textual/__init__.py
index 4e233dc04..c0c22e485 100644
--- a/src/textual/__init__.py
+++ b/src/textual/__init__.py
@@ -4,10 +4,14 @@ import inspect
 
 import rich.repr
 from rich.console import RenderableType
+from typing import TYPE_CHECKING
 
 from ._context import active_app
 from ._log import LogGroup, LogVerbosity
-from ._typing import TypeAlias
+
+
+if TYPE_CHECKING:
+    from typing import Callable, TypeAlias
 
 __all__ = ["log", "panic", "__version__"]  # type: ignore
 
diff --git a/src/textual/_border.py b/src/textual/_border.py
index b14c2c6fd..6d86806e4 100644
--- a/src/textual/_border.py
+++ b/src/textual/_border.py
@@ -1,14 +1,16 @@
 from __future__ import annotations
 
 from functools import lru_cache
-from typing import cast, Tuple, Union
+from typing import cast, Tuple, TYPE_CHECKING, Union
 
 from rich.segment import Segment
 from rich.style import Style
 
 from .color import Color
 from .css.types import EdgeStyle, EdgeType
-from ._typing import TypeAlias
+
+if TYPE_CHECKING:
+    from typing import TypeAlias
 
 INNER = 1
 OUTER = 2
diff --git a/src/textual/_compositor.py b/src/textual/_compositor.py
index a60aa29f3..a51a861cd 100644
--- a/src/textual/_compositor.py
+++ b/src/textual/_compositor.py
@@ -59,7 +59,7 @@ class MapGeometry(NamedTuple):
 
 
 # Maps a widget on to its geometry (information that describes its position in the composition)
-CompositorMap: TypeAlias = dict[Widget, MapGeometry]
+CompositorMap: TypeAlias = "dict[Widget, MapGeometry]"
 
 
 @rich.repr.auto(angular=True)