Merge pull request #3280 from plotly/fix-flask-typing

Remove flask typing import.

Author: T4rk1n

CHANGELOG.md

@@ -6,6 +6,7 @@ This project adheres to [Semantic Versioning](https://semver.org/).
 
 ## Fixed
 - [#3278](https://github.com/plotly/dash/pull/3278) Fix loading selector with children starting at the same digit. Fix [#3276](https://github.com/plotly/dash/issues/3276)
+- [#3280](https://github.com/plotly/dash/pull/3280) Remove flask typing import not available in earlier versions.
 
 ## [3.0.3] - 2025-04-14
 

dash/dash.py

@@ -22,7 +22,6 @@
 
 import flask
 
-from flask.typing import RouteCallable
 from importlib_metadata import version as _get_distribution_version
 
 from dash import dcc
@@ -81,6 +80,8 @@
 from ._jupyter import jupyter_dash, JupyterDisplayMode
 from .types import RendererHooks
 
+RouteCallable = Callable[..., Any]
+
 # If dash_design_kit is installed, check for version
 ddk_version = None
 if find_spec("dash_design_kit"):