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

[homosapien-lcy]

Problem Description
ImportError: cannot import name 'marker_trait' from 'chaco.api' when trying to run a 2008 demo

Reproduction Steps:

python chaco/examples/tutorials/scipy2008/traits_example.py

Expected behavior:
test past

OS, Python version: [MacOS, python3.8 (with or without edm) or 3.11]

[homosapien-lcy]

In issue #878 It is caused by not importing from the right API. This may be a problem of similar cause.

[corranwebster]

In general it is better to fix the demo to conform to the current API than changing the API. Import from enable in the example if that is where things currently are.