ImportError: cannot import name 'BaseTool' from 'chaco.api'

[homosapien-lcy]

Problem Description
ImportError: cannot import name 'BaseTool' from 'chaco.api' when running chaco/examples/demo/canvas/mptools.py

Reproduction Steps:
python chaco/examples/demo/canvas/mptools.py

OS, Python version: [MacOS, python3.11, python3.8 (with EDM)]

[homosapien-lcy]

It seems that BaseTool should be imported from the enable api https://github.com/enthought/enable/blob/main/enable/api.py (line 272), we probably can solve this by importing BaseTool in chaco.api (from enable.api)